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overflow="visible" style="vertical-align:text-bottom"><path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path></svg></a></li><li><a href="https://github.com/marketplace" data-analytics-event="{&quot;action&quot;:&quot;marketplace&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;platform&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;marketplace_link_platform_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Marketplace</span></a></li></ul></div></li></ul><div class="NavDropdown-module__trailingLinkContainer__VgJGL"><a href="https://github.com/features" data-analytics-event="{&quot;action&quot;:&quot;view_all_features&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;platform&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;view_all_features_link_platform_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">View all features</span><svg data-component="Octicon" aria-hidden="true" focusable="false" class="octicon octicon-chevron-right NavLink-module__arrowIcon__amekg" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path></svg></a></div></div></div></li><li><div class="NavDropdown-module__container__l2YeI js-details-container js-header-menu-item"><button type="button" class="NavDropdown-module__button__PEHWX js-details-target" aria-expanded="false">Solutions<svg data-component="Octicon" aria-hidden="true" focusable="false" class="octicon octicon-chevron-right NavDropdown-module__buttonIcon__Tkl8_" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path></svg></button><div class="NavDropdown-module__dropdown__xm1jd"><ul class="NavDropdown-module__list__zuCgG"><li><div class="NavGroup-module__group__W8SqJ"><span class="NavGroup-module__title__Wzxz2" id="_R_5ib_">BY COMPANY SIZE</span><ul class="NavGroup-module__list__UCOFy" aria-labelledby="_R_5ib_"><li><a href="https://github.com/enterprise" data-analytics-event="{&quot;action&quot;:&quot;enterprises&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;enterprises_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Enterprises</span></a></li><li><a href="https://github.com/team" data-analytics-event="{&quot;action&quot;:&quot;small_and_medium_teams&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;small_and_medium_teams_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Small and medium teams</span></a></li><li><a href="https://github.com/enterprise/startups" data-analytics-event="{&quot;action&quot;:&quot;startups&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;startups_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Startups</span></a></li><li><a href="https://github.com/solutions/industry/nonprofits" data-analytics-event="{&quot;action&quot;:&quot;nonprofits&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;nonprofits_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Nonprofits</span></a></li></ul></div></li><li><div class="NavGroup-module__group__W8SqJ"><span class="NavGroup-module__title__Wzxz2" id="_R_9ib_">BY USE CASE</span><ul class="NavGroup-module__list__UCOFy" aria-labelledby="_R_9ib_"><li><a href="https://github.com/solutions/use-case/app-modernization" data-analytics-event="{&quot;action&quot;:&quot;app_modernization&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;app_modernization_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">App Modernization</span></a></li><li><a href="https://github.com/solutions/use-case/devsecops" data-analytics-event="{&quot;action&quot;:&quot;devsecops&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;devsecops_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">DevSecOps</span></a></li><li><a href="https://github.com/solutions/use-case/devops" data-analytics-event="{&quot;action&quot;:&quot;devops&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;devops_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">DevOps</span></a></li><li><a href="https://github.com/solutions/use-case/ci-cd" data-analytics-event="{&quot;action&quot;:&quot;ci/cd&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;ci/cd_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">CI/CD</span></a></li><li><a href="https://github.com/solutions/use-case" data-analytics-event="{&quot;action&quot;:&quot;view_all_use_cases&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;view_all_use_cases_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">View all use cases</span><svg data-component="Octicon" aria-hidden="true" focusable="false" class="octicon octicon-chevron-right NavLink-module__arrowIcon__amekg" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path></svg></a></li></ul></div></li><li><div class="NavGroup-module__group__W8SqJ"><span class="NavGroup-module__title__Wzxz2" id="_R_dib_">BY INDUSTRY</span><ul class="NavGroup-module__list__UCOFy" aria-labelledby="_R_dib_"><li><a href="https://github.com/solutions/industry/healthcare" data-analytics-event="{&quot;action&quot;:&quot;healthcare&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;healthcare_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Healthcare</span></a></li><li><a href="https://github.com/solutions/industry/financial-services" data-analytics-event="{&quot;action&quot;:&quot;financial_services&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;financial_services_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Financial services</span></a></li><li><a href="https://github.com/solutions/industry/manufacturing" data-analytics-event="{&quot;action&quot;:&quot;manufacturing&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;manufacturing_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Manufacturing</span></a></li><li><a href="https://github.com/solutions/industry/government" data-analytics-event="{&quot;action&quot;:&quot;government&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;government_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Government</span></a></li><li><a href="https://github.com/solutions/industry" data-analytics-event="{&quot;action&quot;:&quot;view_all_industries&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;view_all_industries_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">View all industries</span><svg data-component="Octicon" aria-hidden="true" focusable="false" class="octicon octicon-chevron-right NavLink-module__arrowIcon__amekg" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path></svg></a></li></ul></div></li></ul><div class="NavDropdown-module__trailingLinkContainer__VgJGL"><a href="https://github.com/solutions" data-analytics-event="{&quot;action&quot;:&quot;view_all_solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;view_all_solutions_link_solutions_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">View all solutions</span><svg data-component="Octicon" aria-hidden="true" focusable="false" class="octicon octicon-chevron-right NavLink-module__arrowIcon__amekg" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path></svg></a></div></div></div></li><li><div class="NavDropdown-module__container__l2YeI js-details-container js-header-menu-item"><button type="button" class="NavDropdown-module__button__PEHWX js-details-target" aria-expanded="false">Resources<svg data-component="Octicon" aria-hidden="true" focusable="false" class="octicon octicon-chevron-right NavDropdown-module__buttonIcon__Tkl8_" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path></svg></button><div class="NavDropdown-module__dropdown__xm1jd"><ul class="NavDropdown-module__list__zuCgG"><li><div class="NavGroup-module__group__W8SqJ"><span class="NavGroup-module__title__Wzxz2" id="_R_5jb_">EXPLORE BY TOPIC</span><ul class="NavGroup-module__list__UCOFy" aria-labelledby="_R_5jb_"><li><a href="https://github.com/resources/articles?topic=ai" data-analytics-event="{&quot;action&quot;:&quot;ai&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;ai_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">AI</span></a></li><li><a href="https://github.com/resources/articles?topic=software-development" data-analytics-event="{&quot;action&quot;:&quot;software_development&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;software_development_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Software Development</span></a></li><li><a href="https://github.com/resources/articles?topic=devops" data-analytics-event="{&quot;action&quot;:&quot;devops&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;devops_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">DevOps</span></a></li><li><a href="https://github.com/resources/articles?topic=security" data-analytics-event="{&quot;action&quot;:&quot;security&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;security_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Security</span></a></li><li><a href="https://github.com/resources/articles" data-analytics-event="{&quot;action&quot;:&quot;view_all_topics&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;view_all_topics_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">View all topics</span><svg data-component="Octicon" aria-hidden="true" focusable="false" class="octicon octicon-chevron-right NavLink-module__arrowIcon__amekg" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path></svg></a></li></ul></div></li><li><div class="NavGroup-module__group__W8SqJ"><span class="NavGroup-module__title__Wzxz2" id="_R_9jb_">EXPLORE BY TYPE</span><ul class="NavGroup-module__list__UCOFy" aria-labelledby="_R_9jb_"><li><a href="https://github.com/customer-stories" data-analytics-event="{&quot;action&quot;:&quot;customer_stories&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;customer_stories_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Customer stories</span></a></li><li><a href="https://github.com/resources/events" data-analytics-event="{&quot;action&quot;:&quot;events__webinars&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;events__webinars_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Events &amp; webinars</span></a></li><li><a href="https://github.com/resources/whitepapers" data-analytics-event="{&quot;action&quot;:&quot;ebooks__reports&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;ebooks__reports_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Ebooks &amp; reports</span></a></li><li><a href="https://github.com/solutions/executive-insights" data-analytics-event="{&quot;action&quot;:&quot;business_insights&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;location&quot;:&quot;navbar&quot;,&quot;label&quot;:&quot;business_insights_link_resources_navbar&quot;}" class="NavLink-module__link__EG3d4"><span class="NavLink-module__title__Q7t0p">Business insights</span></a></li><li><a href="https://skills.github.com" 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<template id="code-icon">
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<template id="history-icon">
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<template id="repo-icon">
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<template id="bookmark-icon">
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<template id="plus-circle-icon">
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<template id="circle-icon">
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<template id="trash-icon">
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<template id="team-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-people">
    <path d="M2 5.5a3.5 3.5 0 1 1 5.898 2.549 5.508 5.508 0 0 1 3.034 4.084.75.75 0 1 1-1.482.235 4 4 0 0 0-7.9 0 .75.75 0 0 1-1.482-.236A5.507 5.507 0 0 1 3.102 8.05 3.493 3.493 0 0 1 2 5.5ZM11 4a3.001 3.001 0 0 1 2.22 5.018 5.01 5.01 0 0 1 2.56 3.012.749.749 0 0 1-.885.954.752.752 0 0 1-.549-.514 3.507 3.507 0 0 0-2.522-2.372.75.75 0 0 1-.574-.73v-.352a.75.75 0 0 1 .416-.672A1.5 1.5 0 0 0 11 5.5.75.75 0 0 1 11 4Zm-5.5-.5a2 2 0 1 0-.001 3.999A2 2 0 0 0 5.5 3.5Z"></path>
</svg>
</template>

<template id="project-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-project">
    <path d="M1.75 0h12.5C15.216 0 16 .784 16 1.75v12.5A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25V1.75C0 .784.784 0 1.75 0ZM1.5 1.75v12.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25ZM11.75 3a.75.75 0 0 1 .75.75v7.5a.75.75 0 0 1-1.5 0v-7.5a.75.75 0 0 1 .75-.75Zm-8.25.75a.75.75 0 0 1 1.5 0v5.5a.75.75 0 0 1-1.5 0ZM8 3a.75.75 0 0 1 .75.75v3.5a.75.75 0 0 1-1.5 0v-3.5A.75.75 0 0 1 8 3Z"></path>
</svg>
</template>

<template id="pencil-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-pencil">
    <path d="M11.013 1.427a1.75 1.75 0 0 1 2.474 0l1.086 1.086a1.75 1.75 0 0 1 0 2.474l-8.61 8.61c-.21.21-.47.364-.756.445l-3.251.93a.75.75 0 0 1-.927-.928l.929-3.25c.081-.286.235-.547.445-.758l8.61-8.61Zm.176 4.823L9.75 4.81l-6.286 6.287a.253.253 0 0 0-.064.108l-.558 1.953 1.953-.558a.253.253 0 0 0 .108-.064Zm1.238-3.763a.25.25 0 0 0-.354 0L10.811 3.75l1.439 1.44 1.263-1.263a.25.25 0 0 0 0-.354Z"></path>
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</template>

<template id="copilot-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copilot">
    <path d="M7.998 15.035c-4.562 0-7.873-2.914-7.998-3.749V9.338c.085-.628.677-1.686 1.588-2.065.013-.07.024-.143.036-.218.029-.183.06-.384.126-.612-.201-.508-.254-1.084-.254-1.656 0-.87.128-1.769.693-2.484.579-.733 1.494-1.124 2.724-1.261 1.206-.134 2.262.034 2.944.765.05.053.096.108.139.165.044-.057.094-.112.143-.165.682-.731 1.738-.899 2.944-.765 1.23.137 2.145.528 2.724 1.261.566.715.693 1.614.693 2.484 0 .572-.053 1.148-.254 1.656.066.228.098.429.126.612.012.076.024.148.037.218.924.385 1.522 1.471 1.591 2.095v1.872c0 .766-3.351 3.795-8.002 3.795Zm0-1.485c2.28 0 4.584-1.11 5.002-1.433V7.862l-.023-.116c-.49.21-1.075.291-1.727.291-1.146 0-2.059-.327-2.71-.991A3.222 3.222 0 0 1 8 6.303a3.24 3.24 0 0 1-.544.743c-.65.664-1.563.991-2.71.991-.652 0-1.236-.081-1.727-.291l-.023.116v4.255c.419.323 2.722 1.433 5.002 1.433ZM6.762 2.83c-.193-.206-.637-.413-1.682-.297-1.019.113-1.479.404-1.713.7-.247.312-.369.789-.369 1.554 0 .793.129 1.171.308 1.371.162.181.519.379 1.442.379.853 0 1.339-.235 1.638-.54.315-.322.527-.827.617-1.553.117-.935-.037-1.395-.241-1.614Zm4.155-.297c-1.044-.116-1.488.091-1.681.297-.204.219-.359.679-.242 1.614.091.726.303 1.231.618 1.553.299.305.784.54 1.638.54.922 0 1.28-.198 1.442-.379.179-.2.308-.578.308-1.371 0-.765-.123-1.242-.37-1.554-.233-.296-.693-.587-1.713-.7Z"></path><path d="M6.25 9.037a.75.75 0 0 1 .75.75v1.501a.75.75 0 0 1-1.5 0V9.787a.75.75 0 0 1 .75-.75Zm4.25.75v1.501a.75.75 0 0 1-1.5 0V9.787a.75.75 0 0 1 1.5 0Z"></path>
</svg>
</template>

<template id="copilot-error-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copilot-error">
    <path d="M16 11.24c0 .112-.072.274-.21.467L13 9.688V7.862l-.023-.116c-.49.21-1.075.291-1.727.291-.198 0-.388-.009-.571-.029L6.833 5.226a4.01 4.01 0 0 0 .17-.782c.117-.935-.037-1.395-.241-1.614-.193-.206-.637-.413-1.682-.297-.683.076-1.115.231-1.395.415l-1.257-.91c.579-.564 1.413-.877 2.485-.996 1.206-.134 2.262.034 2.944.765.05.053.096.108.139.165.044-.057.094-.112.143-.165.682-.731 1.738-.899 2.944-.765 1.23.137 2.145.528 2.724 1.261.566.715.693 1.614.693 2.484 0 .572-.053 1.148-.254 1.656.066.228.098.429.126.612.012.076.024.148.037.218.924.385 1.522 1.471 1.591 2.095Zm-5.083-8.707c-1.044-.116-1.488.091-1.681.297-.204.219-.359.679-.242 1.614.091.726.303 1.231.618 1.553.299.305.784.54 1.638.54.922 0 1.28-.198 1.442-.379.179-.2.308-.578.308-1.371 0-.765-.123-1.242-.37-1.554-.233-.296-.693-.587-1.713-.7Zm2.511 11.074c-1.393.776-3.272 1.428-5.43 1.428-4.562 0-7.873-2.914-7.998-3.749V9.338c.085-.628.677-1.686 1.588-2.065.013-.07.024-.143.036-.218.029-.183.06-.384.126-.612-.18-.455-.241-.963-.252-1.475L.31 4.107A.747.747 0 0 1 0 3.509V3.49a.748.748 0 0 1 .625-.73c.156-.026.306.047.435.139l14.667 10.578a.592.592 0 0 1 .227.264.752.752 0 0 1 .046.249v.022a.75.75 0 0 1-1.19.596Zm-1.367-.991L5.635 7.964a5.128 5.128 0 0 1-.889.073c-.652 0-1.236-.081-1.727-.291l-.023.116v4.255c.419.323 2.722 1.433 5.002 1.433 1.539 0 3.089-.505 4.063-.934Z"></path>
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</template>

<template id="workflow-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-workflow">
    <path d="M0 1.75C0 .784.784 0 1.75 0h3.5C6.216 0 7 .784 7 1.75v3.5A1.75 1.75 0 0 1 5.25 7H4v4a1 1 0 0 0 1 1h4v-1.25C9 9.784 9.784 9 10.75 9h3.5c.966 0 1.75.784 1.75 1.75v3.5A1.75 1.75 0 0 1 14.25 16h-3.5A1.75 1.75 0 0 1 9 14.25v-.75H5A2.5 2.5 0 0 1 2.5 11V7h-.75A1.75 1.75 0 0 1 0 5.25Zm1.75-.25a.25.25 0 0 0-.25.25v3.5c0 .138.112.25.25.25h3.5a.25.25 0 0 0 .25-.25v-3.5a.25.25 0 0 0-.25-.25Zm9 9a.25.25 0 0 0-.25.25v3.5c0 .138.112.25.25.25h3.5a.25.25 0 0 0 .25-.25v-3.5a.25.25 0 0 0-.25-.25Z"></path>
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</template>

<template id="book-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-book">
    <path d="M0 1.75A.75.75 0 0 1 .75 1h4.253c1.227 0 2.317.59 3 1.501A3.743 3.743 0 0 1 11.006 1h4.245a.75.75 0 0 1 .75.75v10.5a.75.75 0 0 1-.75.75h-4.507a2.25 2.25 0 0 0-1.591.659l-.622.621a.75.75 0 0 1-1.06 0l-.622-.621A2.25 2.25 0 0 0 5.258 13H.75a.75.75 0 0 1-.75-.75Zm7.251 10.324.004-5.073-.002-2.253A2.25 2.25 0 0 0 5.003 2.5H1.5v9h3.757a3.75 3.75 0 0 1 1.994.574ZM8.755 4.75l-.004 7.322a3.752 3.752 0 0 1 1.992-.572H14.5v-9h-3.495a2.25 2.25 0 0 0-2.25 2.25Z"></path>
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</template>

<template id="code-review-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code-review">
    <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v8.5A1.75 1.75 0 0 1 14.25 13H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 14.543V13H1.75A1.75 1.75 0 0 1 0 11.25v-8.5C0 1.784.784 1 1.75 1ZM1.5 2.75v8.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-8.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Zm5.28 1.72a.75.75 0 0 1 0 1.06L5.31 7l1.47 1.47a.751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018l-2-2a.75.75 0 0 1 0-1.06l2-2a.75.75 0 0 1 1.06 0Zm2.44 0a.75.75 0 0 1 1.06 0l2 2a.75.75 0 0 1 0 1.06l-2 2a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L10.69 7 9.22 5.53a.75.75 0 0 1 0-1.06Z"></path>
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</template>

<template id="codespaces-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-codespaces">
    <path d="M0 11.25c0-.966.784-1.75 1.75-1.75h12.5c.966 0 1.75.784 1.75 1.75v3A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25Zm2-9.5C2 .784 2.784 0 3.75 0h8.5C13.216 0 14 .784 14 1.75v5a1.75 1.75 0 0 1-1.75 1.75h-8.5A1.75 1.75 0 0 1 2 6.75Zm1.75-.25a.25.25 0 0 0-.25.25v5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-5a.25.25 0 0 0-.25-.25Zm-2 9.5a.25.25 0 0 0-.25.25v3c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-3a.25.25 0 0 0-.25-.25Z"></path><path d="M7 12.75a.75.75 0 0 1 .75-.75h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1-.75-.75Zm-4 0a.75.75 0 0 1 .75-.75h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1-.75-.75Z"></path>
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</template>

<template id="comment-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-comment">
    <path d="M1 2.75C1 1.784 1.784 1 2.75 1h10.5c.966 0 1.75.784 1.75 1.75v7.5A1.75 1.75 0 0 1 13.25 12H9.06l-2.573 2.573A1.458 1.458 0 0 1 4 13.543V12H2.75A1.75 1.75 0 0 1 1 10.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h4.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path>
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</template>

<template id="comment-discussion-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-comment-discussion">
    <path d="M1.75 1h8.5c.966 0 1.75.784 1.75 1.75v5.5A1.75 1.75 0 0 1 10.25 10H7.061l-2.574 2.573A1.458 1.458 0 0 1 2 11.543V10h-.25A1.75 1.75 0 0 1 0 8.25v-5.5C0 1.784.784 1 1.75 1ZM1.5 2.75v5.5c0 .138.112.25.25.25h1a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h3.5a.25.25 0 0 0 .25-.25v-5.5a.25.25 0 0 0-.25-.25h-8.5a.25.25 0 0 0-.25.25Zm13 2a.25.25 0 0 0-.25-.25h-.5a.75.75 0 0 1 0-1.5h.5c.966 0 1.75.784 1.75 1.75v5.5A1.75 1.75 0 0 1 14.25 12H14v1.543a1.458 1.458 0 0 1-2.487 1.03L9.22 12.28a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215l2.22 2.22v-2.19a.75.75 0 0 1 .75-.75h1a.25.25 0 0 0 .25-.25Z"></path>
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</template>

<template id="organization-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-organization">
    <path d="M1.75 16A1.75 1.75 0 0 1 0 14.25V1.75C0 .784.784 0 1.75 0h8.5C11.216 0 12 .784 12 1.75v12.5c0 .085-.006.168-.018.25h2.268a.25.25 0 0 0 .25-.25V8.285a.25.25 0 0 0-.111-.208l-1.055-.703a.749.749 0 1 1 .832-1.248l1.055.703c.487.325.779.871.779 1.456v5.965A1.75 1.75 0 0 1 14.25 16h-3.5a.766.766 0 0 1-.197-.026c-.099.017-.2.026-.303.026h-3a.75.75 0 0 1-.75-.75V14h-1v1.25a.75.75 0 0 1-.75.75Zm-.25-1.75c0 .138.112.25.25.25H4v-1.25a.75.75 0 0 1 .75-.75h2.5a.75.75 0 0 1 .75.75v1.25h2.25a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25h-8.5a.25.25 0 0 0-.25.25ZM3.75 6h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5ZM3 3.75A.75.75 0 0 1 3.75 3h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 3.75Zm4 3A.75.75 0 0 1 7.75 6h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 7 6.75ZM7.75 3h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5ZM3 9.75A.75.75 0 0 1 3.75 9h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 9.75ZM7.75 9h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5Z"></path>
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</template>

<template id="rocket-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-rocket">
    <path d="M14.064 0h.186C15.216 0 16 .784 16 1.75v.186a8.752 8.752 0 0 1-2.564 6.186l-.458.459c-.314.314-.641.616-.979.904v3.207c0 .608-.315 1.172-.833 1.49l-2.774 1.707a.749.749 0 0 1-1.11-.418l-.954-3.102a1.214 1.214 0 0 1-.145-.125L3.754 9.816a1.218 1.218 0 0 1-.124-.145L.528 8.717a.749.749 0 0 1-.418-1.11l1.71-2.774A1.748 1.748 0 0 1 3.31 4h3.204c.288-.338.59-.665.904-.979l.459-.458A8.749 8.749 0 0 1 14.064 0ZM8.938 3.623h-.002l-.458.458c-.76.76-1.437 1.598-2.02 2.5l-1.5 2.317 2.143 2.143 2.317-1.5c.902-.583 1.74-1.26 2.499-2.02l.459-.458a7.25 7.25 0 0 0 2.123-5.127V1.75a.25.25 0 0 0-.25-.25h-.186a7.249 7.249 0 0 0-5.125 2.123ZM3.56 14.56c-.732.732-2.334 1.045-3.005 1.148a.234.234 0 0 1-.201-.064.234.234 0 0 1-.064-.201c.103-.671.416-2.273 1.15-3.003a1.502 1.502 0 1 1 2.12 2.12Zm6.94-3.935c-.088.06-.177.118-.266.175l-2.35 1.521.548 1.783 1.949-1.2a.25.25 0 0 0 .119-.213ZM3.678 8.116 5.2 5.766c.058-.09.117-.178.176-.266H3.309a.25.25 0 0 0-.213.119l-1.2 1.95ZM12 5a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path>
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<template id="shield-check-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-shield-check">
    <path d="m8.533.133 5.25 1.68A1.75 1.75 0 0 1 15 3.48V7c0 1.566-.32 3.182-1.303 4.682-.983 1.498-2.585 2.813-5.032 3.855a1.697 1.697 0 0 1-1.33 0c-2.447-1.042-4.049-2.357-5.032-3.855C1.32 10.182 1 8.566 1 7V3.48a1.75 1.75 0 0 1 1.217-1.667l5.25-1.68a1.748 1.748 0 0 1 1.066 0Zm-.61 1.429.001.001-5.25 1.68a.251.251 0 0 0-.174.237V7c0 1.36.275 2.666 1.057 3.859.784 1.194 2.121 2.342 4.366 3.298a.196.196 0 0 0 .154 0c2.245-.957 3.582-2.103 4.366-3.297C13.225 9.666 13.5 8.358 13.5 7V3.48a.25.25 0 0 0-.174-.238l-5.25-1.68a.25.25 0 0 0-.153 0ZM11.28 6.28l-3.5 3.5a.75.75 0 0 1-1.06 0l-1.5-1.5a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215l.97.97 2.97-2.97a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042Z"></path>
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</template>

<template id="heart-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-heart">
    <path d="m8 14.25.345.666a.75.75 0 0 1-.69 0l-.008-.004-.018-.01a7.152 7.152 0 0 1-.31-.17 22.055 22.055 0 0 1-3.434-2.414C2.045 10.731 0 8.35 0 5.5 0 2.836 2.086 1 4.25 1 5.797 1 7.153 1.802 8 3.02 8.847 1.802 10.203 1 11.75 1 13.914 1 16 2.836 16 5.5c0 2.85-2.045 5.231-3.885 6.818a22.066 22.066 0 0 1-3.744 2.584l-.018.01-.006.003h-.002ZM4.25 2.5c-1.336 0-2.75 1.164-2.75 3 0 2.15 1.58 4.144 3.365 5.682A20.58 20.58 0 0 0 8 13.393a20.58 20.58 0 0 0 3.135-2.211C12.92 9.644 14.5 7.65 14.5 5.5c0-1.836-1.414-3-2.75-3-1.373 0-2.609.986-3.029 2.456a.749.749 0 0 1-1.442 0C6.859 3.486 5.623 2.5 4.25 2.5Z"></path>
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</template>

<template id="server-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-server">
    <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v4c0 .372-.116.717-.314 1 .198.283.314.628.314 1v4a1.75 1.75 0 0 1-1.75 1.75H1.75A1.75 1.75 0 0 1 0 12.75v-4c0-.358.109-.707.314-1a1.739 1.739 0 0 1-.314-1v-4C0 1.784.784 1 1.75 1ZM1.5 2.75v4c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-4a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Zm.25 5.75a.25.25 0 0 0-.25.25v4c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-4a.25.25 0 0 0-.25-.25ZM7 4.75A.75.75 0 0 1 7.75 4h4.5a.75.75 0 0 1 0 1.5h-4.5A.75.75 0 0 1 7 4.75ZM7.75 10h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1 0-1.5ZM3 4.75A.75.75 0 0 1 3.75 4h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 4.75ZM3.75 10h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5Z"></path>
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<template id="globe-icon">
  <svg aria-hidden="true" data-component="Octicon" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-globe">
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        <div class="position-relative">
                        <ul
              role="listbox"
              class="ActionListWrap QueryBuilder-ListWrap"
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          <input type="hidden" id="custom_scope_id" name="custom_scope_id" data-target="custom-scopes.customScopesIdField">

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                class="form-control"
                autocomplete="off"
                placeholder="github-ruby"
                required
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          <div class="form-group">
            <label for="custom_scope_query">Query</label>
            <input
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              name="custom_scope_query"
              id="custom_scope_query"
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              class="form-control"
              autocomplete="off"
              placeholder="(repo:mona/a OR repo:mona/b) AND lang:python"
              required
              maxlength="500">
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          <p class="text-small color-fg-muted">
            To see all available qualifiers, see our <a class="Link--inTextBlock" href="https://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax">documentation</a>.
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</form>        </div>

        <div data-target="custom-scopes.manageCustomScopesForm">
          <div data-target="custom-scopes.list"></div>
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</div>
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      <div data-view-component="true" class="Overlay-footer Overlay-footer--alignEnd Overlay-footer--divided">          <button data-action="click:custom-scopes#customScopesCancel" type="button" data-view-component="true" class="btn">    Cancel
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</div>
</dialog></dialog-helper>
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src=\"https://camo.githubusercontent.com/f2c18674e9637d299df6b3c731f6252f9dbb2ef680315be2cafad300aa2b9ce1/68747470733a2f2f7472617669732d63692e6f72672f4b6579616e672f6e6f64652d637376746f6a736f6e2e7376673f6272616e63683d6d6173746572\" alt=\"Build Status\" data-canonical-src=\"https://travis-ci.org/Keyang/node-csvtojson.svg?branch=master\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\n\u003ca href=\"https://coveralls.io/github/Keyang/node-csvtojson?branch=master\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/41c5a72dc0595da8037d607dc8b03f263b27271c490fafb2c681f3dc0dbc4b36/68747470733a2f2f636f766572616c6c732e696f2f7265706f732f6769746875622f4b6579616e672f6e6f64652d637376746f6a736f6e2f62616467652e7376673f6272616e63683d6d6173746572\" alt=\"Coverage Status\" data-canonical-src=\"https://coveralls.io/repos/github/Keyang/node-csvtojson/badge.svg?branch=master\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\n\u003ca href=\"#backers\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/cf7519503e8a2e5230ac2136761931f5228d5a6d05557540d86c8017341e66fd/68747470733a2f2f6f70656e636f6c6c6563746976652e636f6d2f637376746f6a736f6e2f6261636b6572732f62616467652e737667\" alt=\"OpenCollective\" data-canonical-src=\"https://opencollective.com/csvtojson/backers/badge.svg\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\n\u003ca href=\"#sponsors\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/0e2f19c4d92e89a13d83e606a06fb1f42a8e5b6a8302916b268b93f12a5031ec/68747470733a2f2f6f70656e636f6c6c6563746976652e636f6d2f637376746f6a736f6e2f73706f6e736f72732f62616467652e737667\" alt=\"OpenCollective\" data-canonical-src=\"https://opencollective.com/csvtojson/sponsors/badge.svg\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCSVTOJSON\u003c/h1\u003e\u003ca id=\"user-content-csvtojson\" class=\"anchor\" aria-label=\"Permalink: CSVTOJSON\" href=\"#csvtojson\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003ecsvtojson\u003c/code\u003e module is a comprehensive nodejs csv parser to convert csv to json or column arrays. It can be used as node.js library / command line tool / or in browser. Below are some features:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eStrictly follow CSV definition \u003ca href=\"https://www.loc.gov/preservation/digital/formats/fdd/fdd000323.shtml\" rel=\"nofollow\"\u003eRFC4180\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eWork with millions of lines of CSV data\u003c/li\u003e\n\u003cli\u003eProvide comprehensive parsing parameters\u003c/li\u003e\n\u003cli\u003eProvide out of box CSV parsing tool for Command Line\u003c/li\u003e\n\u003cli\u003eBlazing fast -- \u003ca href=\"https://github.com/Keyang/csvbench\"\u003eFocus on performance\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eGive flexibility to developer with 'pre-defined' helpers\u003c/li\u003e\n\u003cli\u003eAllow async / streaming parsing\u003c/li\u003e\n\u003cli\u003eProvide a csv parser for both Node.JS and browsers\u003c/li\u003e\n\u003cli\u003eEasy to use API\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ecsvtojson online\u003c/h1\u003e\u003ca id=\"user-content-csvtojson-online\" class=\"anchor\" aria-label=\"Permalink: csvtojson online\" href=\"#csvtojson-online\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"http://keyangxiang.com/csvtojson/\" rel=\"nofollow\"\u003eHere\u003c/a\u003e is a free online csv to json convert service utilizing latest \u003ccode\u003ecsvtojson\u003c/code\u003e module.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUpgrade to V2\u003c/h1\u003e\u003ca id=\"user-content-upgrade-to-v2\" class=\"anchor\" aria-label=\"Permalink: Upgrade to V2\" href=\"#upgrade-to-v2\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003ecsvtojson\u003c/code\u003e has released version \u003ccode\u003e2.0.0\u003c/code\u003e.\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eTo upgrade to v2, please follow \u003ca href=\"https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md\"\u003eupgrading guide\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eIf you are looking for documentation for \u003ccode\u003ev1\u003c/code\u003e, open \u003ca href=\"https://github.com/Keyang/node-csvtojson/blob/master/docs/readme.v1.md\"\u003ethis page\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eIt is still able to use v1 with \u003ccode\u003ecsvtojson@2.0.0\u003c/code\u003e\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// v1\nconst csvtojsonV1=require(\u0026quot;csvtojson/v1\u0026quot;);\n// v2\nconst csvtojsonV2=require(\u0026quot;csvtojson\u0026quot;);\nconst csvtojsonV2=require(\u0026quot;csvtojson/v2\u0026quot;);\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e// v1\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsvtojsonV1\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"csvtojson/v1\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e// v2\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsvtojsonV2\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"csvtojson\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsvtojsonV2\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"csvtojson/v2\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMenu\u003c/h1\u003e\u003ca id=\"user-content-menu\" class=\"anchor\" aria-label=\"Permalink: Menu\" href=\"#menu\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#quick-start\"\u003eQuick Start\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#api\"\u003eAPI\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#browser-usage\"\u003eBrowser Usage\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#contribution\"\u003eContribution\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eQuick Start\u003c/h1\u003e\u003ca id=\"user-content-quick-start\" class=\"anchor\" aria-label=\"Permalink: Quick Start\" href=\"#quick-start\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#library\"\u003eAs Library\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#command-line-usage\"\u003eAs Command Line Tool\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eLibrary\u003c/h2\u003e\u003ca id=\"user-content-library\" class=\"anchor\" aria-label=\"Permalink: Library\" href=\"#library\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eInstallation\u003c/h3\u003e\u003ca id=\"user-content-installation\" class=\"anchor\" aria-label=\"Permalink: Installation\" href=\"#installation\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"npm i --save csvtojson\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003enpm i --save csvtojson\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFrom CSV File to JSON Array\u003c/h3\u003e\u003ca id=\"user-content-from-csv-file-to-json-array\" class=\"anchor\" aria-label=\"Permalink: From CSV File to JSON Array\" href=\"#from-csv-file-to-json-array\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"/** csv file\na,b,c\n1,2,3\n4,5,6\n*/\nconst csvFilePath='\u0026lt;path to csv file\u0026gt;'\nconst csv=require('csvtojson')\ncsv()\n.fromFile(csvFilePath)\n.then((jsonObj)=\u0026gt;{\n\tconsole.log(jsonObj);\n\t/**\n\t * [\n\t * \t{a:\u0026quot;1\u0026quot;, b:\u0026quot;2\u0026quot;, c:\u0026quot;3\u0026quot;},\n\t * \t{a:\u0026quot;4\u0026quot;, b:\u0026quot;5\u0026quot;. c:\u0026quot;6\u0026quot;}\n\t * ]\n\t */ \n})\n\n// Async / await usage\nconst jsonArray=await csv().fromFile(csvFilePath);\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e/** csv file\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ea,b,c\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e1,2,3\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e4,5,6\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e*/\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsvFilePath\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'\u0026lt;path to csv file\u0026gt;'\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvFilePath\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ethen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-smi\"\u003econsole\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003elog\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e/**\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t * [\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t * \t{a:\"1\", b:\"2\", c:\"3\"},\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t * \t{a:\"4\", b:\"5\". c:\"6\"}\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t * ]\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t */\u003c/span\u003e \n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e// Async / await usage\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ejsonArray\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-k\"\u003eawait\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvFilePath\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFrom CSV String to CSV Row\u003c/h3\u003e\u003ca id=\"user-content-from-csv-string-to-csv-row\" class=\"anchor\" aria-label=\"Permalink: From CSV String to CSV Row\" href=\"#from-csv-string-to-csv-row\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"/**\ncsvStr:\n1,2,3\n4,5,6\n7,8,9\n*/\nconst csv=require('csvtojson')\ncsv({\n\tnoheader:true,\n\toutput: \u0026quot;csv\u0026quot;\n})\n.fromString(csvStr)\n.then((csvRow)=\u0026gt;{ \n\tconsole.log(csvRow) // =\u0026gt; [[\u0026quot;1\u0026quot;,\u0026quot;2\u0026quot;,\u0026quot;3\u0026quot;], [\u0026quot;4\u0026quot;,\u0026quot;5\u0026quot;,\u0026quot;6\u0026quot;], [\u0026quot;7\u0026quot;,\u0026quot;8\u0026quot;,\u0026quot;9\u0026quot;]]\n})\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e/**\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ecsvStr:\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e1,2,3\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e4,5,6\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e7,8,9\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e*/\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003enoheader\u003c/span\u003e:\u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eoutput\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\"csv\"\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvStr\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ethen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvRow\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e \n\t\u003cspan class=\"pl-smi\"\u003econsole\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003elog\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvRow\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e \u003cspan class=\"pl-c\"\u003e// =\u0026gt; [[\"1\",\"2\",\"3\"], [\"4\",\"5\",\"6\"], [\"7\",\"8\",\"9\"]]\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eAsynchronously process each line from csv url\u003c/h3\u003e\u003ca id=\"user-content-asynchronously-process-each-line-from-csv-url\" class=\"anchor\" aria-label=\"Permalink: Asynchronously process each line from csv url\" href=\"#asynchronously-process-each-line-from-csv-url\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const request=require('request')\nconst csv=require('csvtojson')\n\ncsv()\n.fromStream(request.get('http://mywebsite.com/mycsvfile.csv'))\n.subscribe((json)=\u0026gt;{\n\treturn new Promise((resolve,reject)=\u0026gt;{\n\t\t// long operation for each json e.g. transform / write into database.\n\t})\n},onError,onComplete);\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003erequest\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'request'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromStream\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003erequest\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'http://mywebsite.com/mycsvfile.csv'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003esubscribe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejson\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003enew\u003c/span\u003e \u003cspan class=\"pl-v\"\u003ePromise\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresolve\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ereject\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-c\"\u003e// long operation for each json e.g. transform / write into database.\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eonError\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eonComplete\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eConvert to CSV lines\u003c/h3\u003e\u003ca id=\"user-content-convert-to-csv-lines\" class=\"anchor\" aria-label=\"Permalink: Convert to CSV lines\" href=\"#convert-to-csv-lines\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"/**\ncsvStr:\na,b,c\n1,2,3\n4,5,6\n*/\n\nconst csv=require('csvtojson')\ncsv({output:\u0026quot;line\u0026quot;})\n.fromString(csvStr)\n.subscribe((csvLine)=\u0026gt;{ \n\t// csvLine =\u0026gt;  \u0026quot;1,2,3\u0026quot; and \u0026quot;4,5,6\u0026quot;\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e/**\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ecsvStr:\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ea,b,c\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e1,2,3\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e4,5,6\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e*/\u003c/span\u003e\n\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003eoutput\u003c/span\u003e:\u003cspan class=\"pl-s\"\u003e\"line\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvStr\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003esubscribe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvLine\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e \n\t\u003cspan class=\"pl-c\"\u003e// csvLine =\u0026gt;  \"1,2,3\" and \"4,5,6\"\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUse Stream\u003c/h3\u003e\u003ca id=\"user-content-use-stream\" class=\"anchor\" aria-label=\"Permalink: Use Stream\" href=\"#use-stream\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson');\n\nconst readStream=require('fs').createReadStream(csvFilePath);\n\nconst writeStream=request.put('http://mysite.com/obj.json');\n\nreadStream.pipe(csv()).pipe(writeStream);\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ereadStream\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'fs'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ecreateReadStream\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvFilePath\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ewriteStream\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003erequest\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eput\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'http://mysite.com/obj.json'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\n\u003cspan class=\"pl-s1\"\u003ereadStream\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003epipe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003epipe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ewriteStream\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTo find more detailed usage, please see \u003ca href=\"#api\"\u003eAPI\u003c/a\u003e section\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCommand Line Usage\u003c/h2\u003e\u003ca id=\"user-content-command-line-usage\" class=\"anchor\" aria-label=\"Permalink: Command Line Usage\" href=\"#command-line-usage\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eInstallation\u003c/h3\u003e\u003ca id=\"user-content-installation-1\" class=\"anchor\" aria-label=\"Permalink: Installation\" href=\"#installation-1\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ npm i -g csvtojson\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ npm i -g csvtojson\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUsage\u003c/h3\u003e\u003ca id=\"user-content-usage\" class=\"anchor\" aria-label=\"Permalink: Usage\" href=\"#usage\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ csvtojson [options] \u0026lt;csv file path\u0026gt;\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ csvtojson [options] \u0026lt;csv file path\u0026gt;\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eExample\u003c/h3\u003e\u003ca id=\"user-content-example\" class=\"anchor\" aria-label=\"Permalink: Example\" href=\"#example\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eConvert csv file and save result to json file:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ csvtojson source.csv \u0026gt; converted.json\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ csvtojson source.csv \u0026gt; converted.json\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ePipe in csv data:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ cat ./source.csv | csvtojson \u0026gt; converted.json\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ cat ./source.csv | csvtojson \u0026gt; converted.json\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ePrint Help:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ csvtojson\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ csvtojson\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eAPI\u003c/h1\u003e\u003ca id=\"user-content-api\" class=\"anchor\" aria-label=\"Permalink: API\" href=\"#api\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"#parameters\"\u003eParameters\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#asynchronous-result-process\"\u003eAsynchronous Result Process\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#events\"\u003eEvents\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#hook--transform\"\u003eHook / Transform\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#nested-json-structure\"\u003eNested JSON Structure\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#header-row\"\u003eHeader Row\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#column-parser\"\u003eColumn Parser\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eParameters\u003c/h2\u003e\u003ca id=\"user-content-parameters\" class=\"anchor\" aria-label=\"Permalink: Parameters\" href=\"#parameters\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003erequire('csvtojson')\u003c/code\u003e returns a constructor function which takes 2 arguments:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eParser parameters\u003c/li\u003e\n\u003cli\u003eStream options\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\nconst converter=csv(parserParameters, streamOptions)\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003econverter\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eparserParameters\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003estreamOptions\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eBoth arguments are optional.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFor \u003ccode\u003eStream Options\u003c/code\u003e please read \u003ca href=\"https://nodejs.org/api/stream.html#stream_new_stream_transform_options\" rel=\"nofollow\"\u003eStream Option\u003c/a\u003e from Node.JS\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eparserParameters\u003c/code\u003e is a JSON object like:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const converter=csv({\n\tnoheader:true,\n\ttrim:true,\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003econverter\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003enoheader\u003c/span\u003e:\u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003etrim\u003c/span\u003e:\u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFollowing parameters are supported:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003cstrong\u003eoutput\u003c/strong\u003e: The format to be converted to. \"json\" (default) -- convert csv to json. \"csv\" -- convert csv to csv row array. \"line\" -- convert csv to csv line string\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003edelimiter\u003c/strong\u003e: delimiter used for separating columns. Use \"auto\" if delimiter is unknown in advance, in this case, delimiter will be auto-detected (by best attempt). Use an array to give a list of potential delimiters e.g. [\",\",\"|\",\"$\"]. default: \",\"\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003equote\u003c/strong\u003e: If a column contains delimiter, it is able to use quote character to surround the column content. e.g. \"hello, world\" won't be split into two columns while parsing. Set to \"off\" will ignore all quotes. default: \" (double quote)\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003etrim\u003c/strong\u003e: Indicate if parser trim off spaces surrounding column content. e.g. \"  content  \" will be trimmed to \"content\". Default: true\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003echeckType\u003c/strong\u003e: This parameter turns on and off whether check field type. Default is false. (The default is \u003ccode\u003etrue\u003c/code\u003e if version \u0026lt; 1.1.4)\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eignoreEmpty\u003c/strong\u003e: Ignore the empty value in CSV columns. If a column value is not given, set this to true to skip them. Default: false.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003efork (experimental)\u003c/strong\u003e: Fork another process to parse the CSV stream. It is effective if many concurrent parsing sessions for large csv files. Default: false\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003enoheader\u003c/strong\u003e:Indicating csv data has no header row and first row is data row. Default is false. See \u003ca href=\"#header-row\"\u003eheader row\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eheaders\u003c/strong\u003e: An array to specify the headers of CSV data. If --noheader is false, this value will override CSV header row. Default: null. Example: [\"my field\",\"name\"]. See \u003ca href=\"#header-row\"\u003eheader row\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eflatKeys\u003c/strong\u003e: Don't interpret dots (.) and square brackets in header fields as nested object or array identifiers at all (treat them like regular characters for JSON field identifiers). Default: false.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003emaxRowLength\u003c/strong\u003e: the max character a csv row could have. 0 means infinite. If max number exceeded, parser will emit \"error\" of \"row_exceed\". if a possibly corrupted csv data provided, give it a number like 65535 so the parser won't consume memory. default: 0\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003echeckColumn\u003c/strong\u003e: whether check column number of a row is the same as headers. If column number mismatched headers number, an error of \"mismatched_column\" will be emitted.. default: false\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eeol\u003c/strong\u003e: End of line character. If omitted, parser will attempt to retrieve it from the first chunks of CSV data.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eescape\u003c/strong\u003e: escape character used in quoted column. Default is double quote (\") according to RFC4108. Change to back slash (\\) or other chars for your own case.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eincludeColumns\u003c/strong\u003e: This parameter instructs the parser to include only those columns as specified by the regular expression. Example: /(name|age)/ will parse and include columns whose header contains \"name\" or \"age\"\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eignoreColumns\u003c/strong\u003e: This parameter instructs the parser to ignore columns as specified by the regular expression. Example: /(name|age)/ will ignore columns whose header contains \"name\" or \"age\"\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003ecolParser\u003c/strong\u003e: Allows override parsing logic for a specific column. It accepts a JSON object with fields like: \u003ccode\u003eheadName: \u0026lt;String | Function | ColParser\u0026gt;\u003c/code\u003e . e.g. {field1:'number'} will use built-in number parser to convert value of the \u003ccode\u003efield1\u003c/code\u003e column to number. For more information See \u003ca href=\"#column-parser\"\u003edetails below\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003ealwaysSplitAtEOL\u003c/strong\u003e: Always interpret each line (as defined by \u003ccode\u003eeol\u003c/code\u003e like \u003ccode\u003e\\n\u003c/code\u003e) as a row. This will prevent \u003ccode\u003eeol\u003c/code\u003e characters from being used within a row (even inside a quoted field). Default is false. Change to true if you are confident no inline line breaks (like line break in a cell which has multi line text).\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003enullObject\u003c/strong\u003e: How to parse if a csv cell contains \"null\". Default false will keep \"null\" as string. Change to true if a null object is needed.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003edownstreamFormat\u003c/strong\u003e: Option to set what JSON array format is needed by downstream. \"line\" is also called ndjson format. This format will write lines of JSON (without square brackets and commas) to downstream. \"array\" will write complete JSON array string to downstream (suitable for file writable stream etc). Default \"line\"\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eneedEmitAll\u003c/strong\u003e: Parser will build JSON result if \u003ccode\u003e.then\u003c/code\u003e is called (or await is used). If this is not desired, set this to false. Default is true.\nAll parameters can be used in Command Line tool.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eAsynchronous Result Process\u003c/h2\u003e\u003ca id=\"user-content-asynchronous-result-process\" class=\"anchor\" aria-label=\"Permalink: Asynchronous Result Process\" href=\"#asynchronous-result-process\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSince \u003ccode\u003ev2.0.0\u003c/code\u003e, asynchronous processing has been fully supported.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003ee.g. Process each JSON result asynchronously.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"csv().fromFile(csvFile)\n.subscribe((json)=\u0026gt;{\n\treturn new Promise((resolve,reject)=\u0026gt;{\n\t\t// Async operation on the json\n\t\t// don't forget to call resolve and reject\n\t})\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003esubscribe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejson\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003enew\u003c/span\u003e \u003cspan class=\"pl-v\"\u003ePromise\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresolve\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ereject\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-c\"\u003e// Async operation on the json\u003c/span\u003e\n\t\t\u003cspan class=\"pl-c\"\u003e// don't forget to call resolve and reject\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFor more details please read:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md#add-promise-and-async--await-support\"\u003eAdd Promise and Async / Await support\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md#add-asynchronous-line-by-line-processing-support\"\u003eAdd asynchronous line by line processing support\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md#async-hooks-support\"\u003eAsync Hooks Support\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eEvents\u003c/h2\u003e\u003ca id=\"user-content-events\" class=\"anchor\" aria-label=\"Permalink: Events\" href=\"#events\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eConverter\u003c/code\u003e class defined a series of events.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eheader\u003c/h3\u003e\u003ca id=\"user-content-header\" class=\"anchor\" aria-label=\"Permalink: header\" href=\"#header\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eheader\u003c/code\u003e event is emitted for each CSV file once. It passes an array object which contains the names of the header row.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\ncsv()\n.on('header',(header)=\u0026gt;{\n\t//header=\u0026gt; [header1, header2, header3]\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eon\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'header'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eheader\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e//header=\u0026gt; [header1, header2, header3]\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eheader\u003c/code\u003e is always an array of strings without types.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003edata\u003c/h3\u003e\u003ca id=\"user-content-data\" class=\"anchor\" aria-label=\"Permalink: data\" href=\"#data\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003edata\u003c/code\u003e event is emitted for each parsed CSV line. It passes buffer of stringified JSON in \u003ca href=\"http://ndjson.org/\" rel=\"nofollow\"\u003endjson format\u003c/a\u003e unless \u003ccode\u003eobjectMode\u003c/code\u003e is set true in stream option.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\ncsv()\n.on('data',(data)=\u0026gt;{\n\t//data is a buffer object\n\tconst jsonStr= data.toString('utf8')\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eon\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'data'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003edata\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e//data is a buffer object\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ejsonStr\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003edata\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003etoString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'utf8'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eerror\u003c/h3\u003e\u003ca id=\"user-content-error\" class=\"anchor\" aria-label=\"Permalink: error\" href=\"#error\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eerror\u003c/code\u003e event is emitted if any errors happened during parsing.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\ncsv()\n.on('error',(err)=\u0026gt;{\n\tconsole.log(err)\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eon\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'error'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eerr\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-smi\"\u003econsole\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003elog\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eerr\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eNote that if \u003ccode\u003eerror\u003c/code\u003e being emitted, the process will stop as node.js will automatically \u003ccode\u003eunpipe()\u003c/code\u003e upper-stream and chained down-stream\u003csup\u003e1\u003c/sup\u003e. This will cause \u003ccode\u003eend\u003c/code\u003e event never being emitted because \u003ccode\u003eend\u003c/code\u003e event is only emitted when all data being consumed \u003csup\u003e2\u003c/sup\u003e. If need to know when parsing finished, use \u003ccode\u003edone\u003c/code\u003e event instead of \u003ccode\u003eend\u003c/code\u003e.\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/nodejs/node/blob/master/lib/_stream_readable.js#L572-L583\"\u003eNode.JS Readable Stream\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://nodejs.org/api/stream.html#stream_event_end\" rel=\"nofollow\"\u003eWritable end Event\u003c/a\u003e\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003edone\u003c/h3\u003e\u003ca id=\"user-content-done\" class=\"anchor\" aria-label=\"Permalink: done\" href=\"#done\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003edone\u003c/code\u003e event is emitted either after parsing successfully finished or any error happens. This indicates the processor has stopped.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\ncsv()\n.on('done',(error)=\u0026gt;{\n\t//do some stuff\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eon\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'done'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eerror\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e//do some stuff\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eif any error during parsing, it will be passed in callback.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHook \u0026amp; Transform\u003c/h2\u003e\u003ca id=\"user-content-hook--transform\" class=\"anchor\" aria-label=\"Permalink: Hook \u0026amp; Transform\" href=\"#hook--transform\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eRaw CSV Data Hook\u003c/h3\u003e\u003ca id=\"user-content-raw-csv-data-hook\" class=\"anchor\" aria-label=\"Permalink: Raw CSV Data Hook\" href=\"#raw-csv-data-hook\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ethe hook -- \u003ccode\u003epreRawData\u003c/code\u003e will be called with csv string passed to parser.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\n// synchronous\ncsv()\n.preRawData((csvRawData)=\u0026gt;{\n\tvar newData=csvRawData.replace('some value','another value');\n\treturn newData;\n})\n\n// asynchronous\ncsv()\n.preRawData((csvRawData)=\u0026gt;{\n\treturn new Promise((resolve,reject)=\u0026gt;{\n\t\tvar newData=csvRawData.replace('some value','another value');\n\t\tresolve(newData);\n\t})\n\t\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e// synchronous\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003epreRawData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvRawData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003evar\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003enewData\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvRawData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ereplace\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'some value'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'another value'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003enewData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e// asynchronous\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003epreRawData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvRawData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003enew\u003c/span\u003e \u003cspan class=\"pl-v\"\u003ePromise\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresolve\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ereject\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-k\"\u003evar\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003enewData\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvRawData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ereplace\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'some value'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'another value'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\t\t\u003cspan class=\"pl-s1\"\u003eresolve\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003enewData\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\t\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCSV File Line Hook\u003c/h3\u003e\u003ca id=\"user-content-csv-file-line-hook\" class=\"anchor\" aria-label=\"Permalink: CSV File Line Hook\" href=\"#csv-file-line-hook\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe function is called each time a file line has been parsed in csv stream. The \u003ccode\u003elineIdx\u003c/code\u003e is the file line number in the file starting with 0.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\n// synchronous\ncsv()\n.preFileLine((fileLineString, lineIdx)=\u0026gt;{\n\tif (lineIdx === 2){\n\t\treturn fileLineString.replace('some value','another value')\n\t}\n\treturn fileLineString\n})\n\n// asynchronous\ncsv()\n.preFileLine((fileLineString, lineIdx)=\u0026gt;{\n\treturn new Promise((resolve,reject)=\u0026gt;{\n\t\t\t// async function processing the data.\n\t})\n\t\n\t\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e// synchronous\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003epreFileLine\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003efileLineString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003elineIdx\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003eif\u003c/span\u003e \u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003elineIdx\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e===\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e2\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003efileLineString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ereplace\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'some value'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'another value'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003efileLineString\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e// asynchronous\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003epreFileLine\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003efileLineString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003elineIdx\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003enew\u003c/span\u003e \u003cspan class=\"pl-v\"\u003ePromise\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresolve\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ereject\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\t\u003cspan class=\"pl-c\"\u003e// async function processing the data.\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\t\n\t\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eResult transform\u003c/h3\u003e\u003ca id=\"user-content-result-transform\" class=\"anchor\" aria-label=\"Permalink: Result transform\" href=\"#result-transform\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTo transform result that is sent to downstream, use \u003ccode\u003e.subscribe\u003c/code\u003e method for each json populated.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"const csv=require('csvtojson')\ncsv()\n.subscribe((jsonObj,index)=\u0026gt;{\n\tjsonObj.myNewKey='some value'\n\t// OR asynchronously\n\treturn new Promise((resolve,reject)=\u0026gt;{\n\t\tjsonObj.myNewKey='some value';\n\t\tresolve();\n\t})\n})\n.on('data',(jsonObj)=\u0026gt;{\n\tconsole.log(jsonObj.myNewKey) // some value\n});\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003econst\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'csvtojson'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003esubscribe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eindex\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003emyNewKey\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'some value'\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e// OR asynchronously\u003c/span\u003e\n\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003enew\u003c/span\u003e \u003cspan class=\"pl-v\"\u003ePromise\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresolve\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ereject\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003emyNewKey\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'some value'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\t\t\u003cspan class=\"pl-s1\"\u003eresolve\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eon\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'data'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-smi\"\u003econsole\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003elog\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003emyNewKey\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e \u003cspan class=\"pl-c\"\u003e// some value\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eNested JSON Structure\u003c/h2\u003e\u003ca id=\"user-content-nested-json-structure\" class=\"anchor\" aria-label=\"Permalink: Nested JSON Structure\" href=\"#nested-json-structure\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003ecsvtojson\u003c/code\u003e is able to convert csv line to a nested JSON by correctly defining its csv header row. This is default out-of-box feature.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eHere is an example. Original CSV:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-csv notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"fieldA.title, fieldA.children.0.name, fieldA.children.0.id,fieldA.children.1.name, fieldA.children.1.employee.0.name,fieldA.children.1.employee.1.name, fieldA.address.0,fieldA.address.1, description\nFood Factory, Oscar, 0023, Tikka, Tim, Joe, 3 Lame Road, Grantstown, A fresh new food factory\nKindom Garden, Ceil, 54, Pillow, Amst, Tom, 24 Shaker Street, HelloTown, Awesome castle\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-en\"\u003efieldA.title\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efieldA.children.0.name\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efieldA.children.0.id\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efieldA.children.1.name\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efieldA.children.1.employee.0.name\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efieldA.children.1.employee.1.name\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efieldA.address.0\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efieldA.address.1\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-en\"\u003edescription\u003c/span\u003e\n\u003cspan class=\"pl-s\"\u003eFood Factory\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eOscar\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003e0023\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eTikka\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eTim\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eJoe\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003e3 Lame Road\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eGrantstown\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eA fresh new food factory\u003c/span\u003e\n\u003cspan class=\"pl-s\"\u003eKindom Garden\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eCeil\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003e54\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003ePillow\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eAmst\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eTom\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003e24 Shaker Street\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eHelloTown\u003c/span\u003e\u003cspan class=\"pl-k\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s\"\u003eAwesome castle\u003c/span\u003e\n\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe data above contains nested JSON including nested array of JSON objects and plain texts.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eUsing csvtojson to convert, the result would be like:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-json notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"[{\n    \u0026quot;fieldA\u0026quot;: {\n        \u0026quot;title\u0026quot;: \u0026quot;Food Factory\u0026quot;,\n        \u0026quot;children\u0026quot;: [{\n            \u0026quot;name\u0026quot;: \u0026quot;Oscar\u0026quot;,\n            \u0026quot;id\u0026quot;: \u0026quot;0023\u0026quot;\n        }, {\n            \u0026quot;name\u0026quot;: \u0026quot;Tikka\u0026quot;,\n            \u0026quot;employee\u0026quot;: [{\n                \u0026quot;name\u0026quot;: \u0026quot;Tim\u0026quot;\n            }, {\n                \u0026quot;name\u0026quot;: \u0026quot;Joe\u0026quot;\n            }]\n        }],\n        \u0026quot;address\u0026quot;: [\u0026quot;3 Lame Road\u0026quot;, \u0026quot;Grantstown\u0026quot;]\n    },\n    \u0026quot;description\u0026quot;: \u0026quot;A fresh new food factory\u0026quot;\n}, {\n    \u0026quot;fieldA\u0026quot;: {\n        \u0026quot;title\u0026quot;: \u0026quot;Kindom Garden\u0026quot;,\n        \u0026quot;children\u0026quot;: [{\n            \u0026quot;name\u0026quot;: \u0026quot;Ceil\u0026quot;,\n            \u0026quot;id\u0026quot;: \u0026quot;54\u0026quot;\n        }, {\n            \u0026quot;name\u0026quot;: \u0026quot;Pillow\u0026quot;,\n            \u0026quot;employee\u0026quot;: [{\n                \u0026quot;name\u0026quot;: \u0026quot;Amst\u0026quot;\n            }, {\n                \u0026quot;name\u0026quot;: \u0026quot;Tom\u0026quot;\n            }]\n        }],\n        \u0026quot;address\u0026quot;: [\u0026quot;24 Shaker Street\u0026quot;, \u0026quot;HelloTown\u0026quot;]\n    },\n    \u0026quot;description\u0026quot;: \u0026quot;Awesome castle\u0026quot;\n}]\"\u003e\u003cpre\u003e[{\n    \u003cspan class=\"pl-ent\"\u003e\"fieldA\"\u003c/span\u003e: {\n        \u003cspan class=\"pl-ent\"\u003e\"title\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eFood Factory\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n        \u003cspan class=\"pl-ent\"\u003e\"children\"\u003c/span\u003e: [{\n            \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eOscar\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n            \u003cspan class=\"pl-ent\"\u003e\"id\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e0023\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n        }, {\n            \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eTikka\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n            \u003cspan class=\"pl-ent\"\u003e\"employee\"\u003c/span\u003e: [{\n                \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eTim\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n            }, {\n                \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eJoe\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n            }]\n        }],\n        \u003cspan class=\"pl-ent\"\u003e\"address\"\u003c/span\u003e: [\u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e3 Lame Road\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e, \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eGrantstown\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e]\n    },\n    \u003cspan class=\"pl-ent\"\u003e\"description\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eA fresh new food factory\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n}, {\n    \u003cspan class=\"pl-ent\"\u003e\"fieldA\"\u003c/span\u003e: {\n        \u003cspan class=\"pl-ent\"\u003e\"title\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eKindom Garden\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n        \u003cspan class=\"pl-ent\"\u003e\"children\"\u003c/span\u003e: [{\n            \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eCeil\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n            \u003cspan class=\"pl-ent\"\u003e\"id\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e54\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n        }, {\n            \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003ePillow\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e,\n            \u003cspan class=\"pl-ent\"\u003e\"employee\"\u003c/span\u003e: [{\n                \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eAmst\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n            }, {\n                \u003cspan class=\"pl-ent\"\u003e\"name\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eTom\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n            }]\n        }],\n        \u003cspan class=\"pl-ent\"\u003e\"address\"\u003c/span\u003e: [\u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e24 Shaker Street\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e, \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eHelloTown\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e]\n    },\n    \u003cspan class=\"pl-ent\"\u003e\"description\"\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003eAwesome castle\u003cspan class=\"pl-pds\"\u003e\"\u003c/span\u003e\u003c/span\u003e\n}]\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFlat Keys\u003c/h3\u003e\u003ca id=\"user-content-flat-keys\" class=\"anchor\" aria-label=\"Permalink: Flat Keys\" href=\"#flat-keys\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIn order to not produce nested JSON, simply set \u003ccode\u003eflatKeys:true\u003c/code\u003e in parameters.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"/**\ncsvStr:\na.b,a.c\n1,2\n*/\ncsv({flatKeys:true})\n.fromString(csvStr)\n.subscribe((jsonObj)=\u0026gt;{\n\t//{\u0026quot;a.b\u0026quot;:1,\u0026quot;a.c\u0026quot;:2}  rather than  {\u0026quot;a\u0026quot;:{\u0026quot;b\u0026quot;:1,\u0026quot;c\u0026quot;:2}}\n});\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e/**\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ecsvStr:\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ea.b,a.c\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e1,2\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e*/\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003eflatKeys\u003c/span\u003e:\u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvStr\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003esubscribe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e//{\"a.b\":1,\"a.c\":2}  rather than  {\"a\":{\"b\":1,\"c\":2}}\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHeader Row\u003c/h2\u003e\u003ca id=\"user-content-header-row\" class=\"anchor\" aria-label=\"Permalink: Header Row\" href=\"#header-row\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003ecsvtojson\u003c/code\u003e uses csv header row as generator of JSON keys. However, it does not require the csv source containing a header row. There are 4 ways to define header rows:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eFirst row of csv source. Use first row of csv source as header row. This is default.\u003c/li\u003e\n\u003cli\u003eIf first row of csv source is header row but it is incorrect and need to be replaced. Use \u003ccode\u003eheaders:[]\u003c/code\u003e and \u003ccode\u003enoheader:false\u003c/code\u003e parameters.\u003c/li\u003e\n\u003cli\u003eIf original csv source has no header row but the header definition can be defined. Use \u003ccode\u003eheaders:[]\u003c/code\u003e and \u003ccode\u003enoheader:true\u003c/code\u003e parameters.\u003c/li\u003e\n\u003cli\u003eIf original csv source has no header row and the header definition is unknown. Use \u003ccode\u003enoheader:true\u003c/code\u003e. This will automatically add \u003ccode\u003efieldN\u003c/code\u003e header to csv cells\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eExample\u003c/h3\u003e\u003ca id=\"user-content-example-1\" class=\"anchor\" aria-label=\"Permalink: Example\" href=\"#example-1\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"// replace header row (first row) from original source with 'header1, header2'\ncsv({\n\tnoheader: false,\n\theaders: ['header1','header2']\n})\n\n// original source has no header row. add 'field1' 'field2' ... 'fieldN' as csv header\ncsv({\n\tnoheader: true\n})\n\n// original source has no header row. use 'header1' 'header2' as its header row\ncsv({\n\tnoheader: true,\n\theaders: ['header1','header2']\n})\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e// replace header row (first row) from original source with 'header1, header2'\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003enoheader\u003c/span\u003e: \u003cspan class=\"pl-c1\"\u003efalse\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eheaders\u003c/span\u003e: \u003cspan class=\"pl-kos\"\u003e[\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'header1'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'header2'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e]\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e// original source has no header row. add 'field1' 'field2' ... 'fieldN' as csv header\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003enoheader\u003c/span\u003e: \u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e// original source has no header row. use 'header1' 'header2' as its header row\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003enoheader\u003c/span\u003e: \u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eheaders\u003c/span\u003e: \u003cspan class=\"pl-kos\"\u003e[\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'header1'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'header2'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e]\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eColumn Parser\u003c/h2\u003e\u003ca id=\"user-content-column-parser\" class=\"anchor\" aria-label=\"Permalink: Column Parser\" href=\"#column-parser\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eColumn Parser\u003c/code\u003e allows writing a custom parser for a column in CSV data.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eWhat is Column Parser\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eWhen \u003ccode\u003ecsvtojson\u003c/code\u003e walks through csv data, it converts value in a cell to something else. For example, if \u003ccode\u003echeckType\u003c/code\u003e is \u003ccode\u003etrue\u003c/code\u003e, \u003ccode\u003ecsvtojson\u003c/code\u003e will attempt to find a proper type parser according to the cell value. That is, if cell value is \"5\", a \u003ccode\u003enumberParser\u003c/code\u003e will be used and all value under that column will use the \u003ccode\u003enumberParser\u003c/code\u003e to transform data.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBuilt-in parsers\u003c/h3\u003e\u003ca id=\"user-content-built-in-parsers\" class=\"anchor\" aria-label=\"Permalink: Built-in parsers\" href=\"#built-in-parsers\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThere are currently following built-in parser:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003estring: Convert value to string\u003c/li\u003e\n\u003cli\u003enumber: Convert value to number\u003c/li\u003e\n\u003cli\u003eomit: omit the whole column\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eThis will override types inferred from \u003ccode\u003echeckType:true\u003c/code\u003e parameter. More built-in parsers will be added as requested in \u003ca href=\"https://github.com/Keyang/node-csvtojson/issues\"\u003eissues page\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eExample:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"/*csv string\ncolumn1,column2\nhello,1234\n*/\ncsv({\n\tcolParser:{\n\t\t\u0026quot;column1\u0026quot;:\u0026quot;omit\u0026quot;,\n\t\t\u0026quot;column2\u0026quot;:\u0026quot;string\u0026quot;,\n\t},\n\tcheckType:true\n})\n.fromString(csvString)\n.subscribe((jsonObj)=\u0026gt;{\n\t//jsonObj: {column2:\u0026quot;1234\u0026quot;}\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e/*csv string\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ecolumn1,column2\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ehello,1234\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e*/\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003ecolParser\u003c/span\u003e:\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-s\"\u003e\"column1\"\u003c/span\u003e:\u003cspan class=\"pl-s\"\u003e\"omit\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\t\u003cspan class=\"pl-s\"\u003e\"column2\"\u003c/span\u003e:\u003cspan class=\"pl-s\"\u003e\"string\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003echeckType\u003c/span\u003e:\u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003esubscribe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e//jsonObj: {column2:\"1234\"}\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCustom parsers function\u003c/h3\u003e\u003ca id=\"user-content-custom-parsers-function\" class=\"anchor\" aria-label=\"Permalink: Custom parsers function\" href=\"#custom-parsers-function\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSometimes, developers want to define custom parser. It is able to pass a function to specific column in \u003ccode\u003ecolParser\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eExample:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"/*csv data\nname, birthday\nJoe, 1970-01-01\n*/\ncsv({\n\tcolParser:{\n\t\t\u0026quot;birthday\u0026quot;:function(item, head, resultRow, row , colIdx){\n\t\t\t/*\n\t\t\t\titem - \u0026quot;1970-01-01\u0026quot;\n\t\t\t\thead - \u0026quot;birthday\u0026quot;\n\t\t\t\tresultRow - {name:\u0026quot;Joe\u0026quot;}\n\t\t\t\trow - [\u0026quot;Joe\u0026quot;,\u0026quot;1970-01-01\u0026quot;]\n\t\t\t\tcolIdx - 1\n\t\t\t*/\n\t\t\treturn new Date(item);\n\t\t}\n\t}\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e/*csv data\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ename, birthday\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003eJoe, 1970-01-01\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e*/\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003ecolParser\u003c/span\u003e:\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-s\"\u003e\"birthday\"\u003c/span\u003e:\u003cspan class=\"pl-k\"\u003efunction\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eitem\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ehead\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eresultRow\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003erow\u003c/span\u003e \u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecolIdx\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\t\u003cspan class=\"pl-c\"\u003e/*\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t\t\t\titem - \"1970-01-01\"\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t\t\t\thead - \"birthday\"\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t\t\t\tresultRow - {name:\"Joe\"}\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t\t\t\trow - [\"Joe\",\"1970-01-01\"]\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t\t\t\tcolIdx - 1\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\t\t\t*/\u003c/span\u003e\n\t\t\t\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-k\"\u003enew\u003c/span\u003e \u003cspan class=\"pl-v\"\u003eDate\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eitem\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\t\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAbove example will convert \u003ccode\u003ebirthday\u003c/code\u003e column into a js \u003ccode\u003eDate\u003c/code\u003e object.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe returned value will be used in result JSON object. Returning \u003ccode\u003eundefined\u003c/code\u003e will not change result JSON object.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFlat key column\u003c/h3\u003e\u003ca id=\"user-content-flat-key-column\" class=\"anchor\" aria-label=\"Permalink: Flat key column\" href=\"#flat-key-column\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIt is also able to mark a column as \u003ccode\u003eflat\u003c/code\u003e:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"\n/*csv string\nperson.comment,person.number\nhello,1234\n*/\ncsv({\n\tcolParser:{\n\t\t\u0026quot;person.number\u0026quot;:{\n\t\t\tflat:true,\n\t\t\tcellParser: \u0026quot;number\u0026quot; // string or a function \n\t\t}\n\t}\n})\n.fromString(csvString)\n.subscribe((jsonObj)=\u0026gt;{\n\t//jsonObj: {\u0026quot;person.number\u0026quot;:1234,\u0026quot;person\u0026quot;:{\u0026quot;comment\u0026quot;:\u0026quot;hello\u0026quot;}}\n})\"\u003e\u003cpre\u003e\u003cspan class=\"pl-c\"\u003e/*csv string\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003eperson.comment,person.number\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003ehello,1234\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e*/\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003ecolParser\u003c/span\u003e:\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\u003cspan class=\"pl-s\"\u003e\"person.number\"\u003c/span\u003e:\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\t\t\u003cspan class=\"pl-c1\"\u003eflat\u003c/span\u003e:\u003cspan class=\"pl-c1\"\u003etrue\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\n\t\t\t\u003cspan class=\"pl-c1\"\u003ecellParser\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\"number\"\u003c/span\u003e \u003cspan class=\"pl-c\"\u003e// string or a function \u003c/span\u003e\n\t\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\n\t\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsvString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003esubscribe\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ejsonObj\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c\"\u003e//jsonObj: {\"person.number\":1234,\"person\":{\"comment\":\"hello\"}}\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eContribution\u003c/h1\u003e\u003ca id=\"user-content-contribution\" class=\"anchor\" aria-label=\"Permalink: Contribution\" href=\"#contribution\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eVery much appreciate any types of donation and support.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCode\u003c/h2\u003e\u003ca id=\"user-content-code\" class=\"anchor\" aria-label=\"Permalink: Code\" href=\"#code\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003ecsvtojson\u003c/code\u003e follows github convention for contributions. Here are some steps:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eFork the repo to your github account\u003c/li\u003e\n\u003cli\u003eCheckout code from your github repo to your local machine.\u003c/li\u003e\n\u003cli\u003eMake code changes and don't forget add related tests.\u003c/li\u003e\n\u003cli\u003eRun \u003ccode\u003enpm test\u003c/code\u003e locally before pushing code back.\u003c/li\u003e\n\u003cli\u003eCreate a \u003ca href=\"https://help.github.com/articles/creating-a-pull-request/\"\u003ePull Request\u003c/a\u003e on github.\u003c/li\u003e\n\u003cli\u003eCode review and merge\u003c/li\u003e\n\u003cli\u003eChanges will be published to NPM within next version.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp dir=\"auto\"\u003eThanks all the \u003ca href=\"https://github.com/Keyang/node-csvtojson/graphs/contributors\"\u003econtributors\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBackers\u003c/h2\u003e\u003ca id=\"user-content-backers\" class=\"anchor\" aria-label=\"Permalink: Backers\" href=\"#backers\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThank you to all our backers! [\u003ca href=\"https://opencollective.com/csvtojson#backer\" rel=\"nofollow\"\u003eBecome a backer\u003c/a\u003e]\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://opencollective.com/csvtojson#backer\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/80fa4a517ed899da26b7e8a6bbe8618e1c38bccf34e6c9fbd5e7882dc98e972c/68747470733a2f2f6f70656e636f6c6c6563746976652e636f6d2f637376746f6a736f6e2f6261636b6572732e7376673f77696474683d383930\" alt=\"OpenCollective\" data-canonical-src=\"https://opencollective.com/csvtojson/backers.svg?width=890\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eSponsors\u003c/h2\u003e\u003ca id=\"user-content-sponsors\" class=\"anchor\" aria-label=\"Permalink: Sponsors\" href=\"#sponsors\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThank you to all our sponsors! (please ask your company to also support this open source project by \u003ca href=\"https://opencollective.com/csvtojson#sponsor\" rel=\"nofollow\"\u003ebecoming a sponsor\u003c/a\u003e)\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePaypal\u003c/h2\u003e\u003ca id=\"user-content-paypal\" class=\"anchor\" aria-label=\"Permalink: Paypal\" href=\"#paypal\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick\u0026amp;hosted_button_id=DUBQLRPJADJFQ\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/7b6de155df30b37b25eb5fec52f9213680c3dbf067dfb7d7e2850ac4096c7d05/68747470733a2f2f7777772e70617970616c6f626a656374732e636f6d2f656e5f55532f692f62746e2f62746e5f646f6e6174655f534d2e676966\" alt=\"donate\" data-animated-image=\"\" data-canonical-src=\"https://www.paypalobjects.com/en_US/i/btn/btn_donate_SM.gif\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBrowser Usage\u003c/h1\u003e\u003ca id=\"user-content-browser-usage\" class=\"anchor\" aria-label=\"Permalink: Browser Usage\" href=\"#browser-usage\"\u003e\u003csvg data-component=\"Octicon\" class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTo use \u003ccode\u003ecsvtojson\u003c/code\u003e in browser is quite simple. There are two ways:\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003e1. Embed script directly into script tag\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThere is a pre-built script located in \u003ccode\u003ebrowser/csvtojson.min.js\u003c/code\u003e. Simply include that file in a \u003ccode\u003escript\u003c/code\u003e tag in \u003ccode\u003eindex.html\u003c/code\u003e page:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-text-html-basic notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"\u0026lt;script src=\u0026quot;node_modules/csvtojson/browser/csvtojson.min.js\u0026quot;\u0026gt;\u0026lt;/script\u0026gt;\n\u0026lt;!-- or use cdn --\u0026gt;\n\u0026lt;script src=\u0026quot;https://cdn.rawgit.com/Keyang/node-csvtojson/d41f44aa/browser/csvtojson.min.js\u0026quot;\u0026gt;\u0026lt;/script\u0026gt;\"\u003e\u003cpre\u003e\u003cspan class=\"pl-kos\"\u003e\u0026lt;\u003c/span\u003e\u003cspan class=\"pl-ent\"\u003escript\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003esrc\u003c/span\u003e=\"\u003cspan class=\"pl-s\"\u003enode_modules/csvtojson/browser/csvtojson.min.js\u003c/span\u003e\"\u003cspan class=\"pl-kos\"\u003e\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e\u0026lt;/\u003c/span\u003e\u003cspan class=\"pl-ent\"\u003escript\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e\u0026gt;\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e\u0026lt;!-- or use cdn --\u0026gt;\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e\u0026lt;\u003c/span\u003e\u003cspan class=\"pl-ent\"\u003escript\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003esrc\u003c/span\u003e=\"\u003cspan class=\"pl-s\"\u003ehttps://cdn.rawgit.com/Keyang/node-csvtojson/d41f44aa/browser/csvtojson.min.js\u003c/span\u003e\"\u003cspan class=\"pl-kos\"\u003e\u0026gt;\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e\u0026lt;/\u003c/span\u003e\u003cspan class=\"pl-ent\"\u003escript\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ethen use a global \u003ccode\u003ecsv\u003c/code\u003e function\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-text-html-basic notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"\u0026lt;script\u0026gt;\ncsv({\n\toutput: \u0026quot;csv\u0026quot;\n})\n.fromString(\u0026quot;a,b,c\\n1,2,3\u0026quot;)\n.then(function(result){\n\n})\n\u0026lt;/script\u0026gt;\"\u003e\u003cpre\u003e\u003cspan class=\"pl-kos\"\u003e\u0026lt;\u003c/span\u003e\u003cspan class=\"pl-ent\"\u003escript\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e\u0026gt;\u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\t\u003cspan class=\"pl-c1\"\u003eoutput\u003c/span\u003e: \u003cspan class=\"pl-s\"\u003e\"csv\"\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"a,b,c\\n1,2,3\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ethen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-k\"\u003efunction\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresult\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e\u0026lt;/\u003c/span\u003e\u003cspan class=\"pl-ent\"\u003escript\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003e2. Use webpack or browserify\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf a module packager is preferred, just simply \u003ccode\u003erequire(\"csvtojson\")\u003c/code\u003e:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-js notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"var csv=require(\u0026quot;csvtojson\u0026quot;);\n\n// or with import\nimport {csv} from \u0026quot;csvtojson\u0026quot;;\n\n//then use csv as normal, you'll need to load the CSV first, this example is using Fetch https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch \nfetch('http://mywebsite.com/mycsvfile.csv')\n  .then(response =\u0026gt; response.text())\n  .then(text =\u0026gt; csv.fromString(text));\n  .then(function(result){\n  \n  })\n\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003evar\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-en\"\u003erequire\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"csvtojson\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e// or with import\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003eimport\u003c/span\u003e \u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e \u003cspan class=\"pl-k\"\u003efrom\u003c/span\u003e \u003cspan class=\"pl-s\"\u003e\"csvtojson\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e//then use csv as normal, you'll need to load the CSV first, this example is using Fetch https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch \u003c/span\u003e\n\u003cspan class=\"pl-en\"\u003efetch\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e'http://mywebsite.com/mycsvfile.csv'\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n  \u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ethen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresponse\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003eresponse\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003etext\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\n  \u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ethen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003etext\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e=\u0026gt;\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003ecsv\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003efromString\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003etext\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n  \u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ethen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-k\"\u003efunction\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003eresult\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n  \n  \u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"CSVTOJSON","anchor":"csvtojson","htmlText":"CSVTOJSON"},{"level":1,"text":"csvtojson online","anchor":"csvtojson-online","htmlText":"csvtojson online"},{"level":1,"text":"Upgrade to V2","anchor":"upgrade-to-v2","htmlText":"Upgrade to V2"},{"level":1,"text":"Menu","anchor":"menu","htmlText":"Menu"},{"level":1,"text":"Quick Start","anchor":"quick-start","htmlText":"Quick Start"},{"level":2,"text":"Library","anchor":"library","htmlText":"Library"},{"level":3,"text":"Installation","anchor":"installation","htmlText":"Installation"},{"level":3,"text":"From CSV File to JSON Array","anchor":"from-csv-file-to-json-array","htmlText":"From CSV File to JSON Array"},{"level":3,"text":"From CSV String to CSV Row","anchor":"from-csv-string-to-csv-row","htmlText":"From CSV String to CSV Row"},{"level":3,"text":"Asynchronously process each line from csv url","anchor":"asynchronously-process-each-line-from-csv-url","htmlText":"Asynchronously process each line from csv url"},{"level":3,"text":"Convert to CSV lines","anchor":"convert-to-csv-lines","htmlText":"Convert to CSV lines"},{"level":3,"text":"Use Stream","anchor":"use-stream","htmlText":"Use Stream"},{"level":2,"text":"Command Line Usage","anchor":"command-line-usage","htmlText":"Command Line Usage"},{"level":3,"text":"Installation","anchor":"installation-1","htmlText":"Installation"},{"level":3,"text":"Usage","anchor":"usage","htmlText":"Usage"},{"level":3,"text":"Example","anchor":"example","htmlText":"Example"},{"level":1,"text":"API","anchor":"api","htmlText":"API"},{"level":2,"text":"Parameters","anchor":"parameters","htmlText":"Parameters"},{"level":2,"text":"Asynchronous Result Process","anchor":"asynchronous-result-process","htmlText":"Asynchronous Result Process"},{"level":2,"text":"Events","anchor":"events","htmlText":"Events"},{"level":3,"text":"header","anchor":"header","htmlText":"header"},{"level":3,"text":"data","anchor":"data","htmlText":"data"},{"level":3,"text":"error","anchor":"error","htmlText":"error"},{"level":3,"text":"done","anchor":"done","htmlText":"done"},{"level":2,"text":"Hook \u0026 Transform","anchor":"hook--transform","htmlText":"Hook \u0026amp; Transform"},{"level":3,"text":"Raw CSV Data Hook","anchor":"raw-csv-data-hook","htmlText":"Raw CSV Data Hook"},{"level":3,"text":"CSV File Line Hook","anchor":"csv-file-line-hook","htmlText":"CSV File Line Hook"},{"level":3,"text":"Result transform","anchor":"result-transform","htmlText":"Result transform"},{"level":2,"text":"Nested JSON Structure","anchor":"nested-json-structure","htmlText":"Nested JSON Structure"},{"level":3,"text":"Flat Keys","anchor":"flat-keys","htmlText":"Flat Keys"},{"level":2,"text":"Header Row","anchor":"header-row","htmlText":"Header Row"},{"level":3,"text":"Example","anchor":"example-1","htmlText":"Example"},{"level":2,"text":"Column Parser","anchor":"column-parser","htmlText":"Column Parser"},{"level":3,"text":"Built-in parsers","anchor":"built-in-parsers","htmlText":"Built-in parsers"},{"level":3,"text":"Custom parsers function","anchor":"custom-parsers-function","htmlText":"Custom parsers function"},{"level":3,"text":"Flat key column","anchor":"flat-key-column","htmlText":"Flat key column"},{"level":1,"text":"Contribution","anchor":"contribution","htmlText":"Contribution"},{"level":2,"text":"Code","anchor":"code","htmlText":"Code"},{"level":2,"text":"Backers","anchor":"backers","htmlText":"Backers"},{"level":2,"text":"Sponsors","anchor":"sponsors","htmlText":"Sponsors"},{"level":2,"text":"Paypal","anchor":"paypal","htmlText":"Paypal"},{"level":1,"text":"Browser Usage","anchor":"browser-usage","htmlText":"Browser Usage"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2FKeyang%2Fnode-csvtojson"}},{"displayName":"LICENSE","repoName":"node-csvtojson","refName":"master","path":"LICENSE","preferredFileType":"license","tabName":"MIT","richText":null,"loaded":false,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":null,"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2FKeyang%2Fnode-csvtojson"}}],"overviewFilesProcessingTime":0,"copilotSWEAgentEnabled":false}},"codeViewLayoutRoute":{"repo":{"id":10744004,"defaultBranch":"master","name":"node-csvtojson","ownerLogin":"Keyang","currentUserCanPush":false,"isFork":false,"isEmpty":false,"createdAt":"2013-06-17T18:29:56.000Z","ownerAvatar":"https://avatars.githubusercontent.com/u/1092855?v=4","public":true,"private":false,"isOrgOwned":false},"currentUser":null,"uploadToken":"3NJS9dPZEhMliKixPSv18M3qXtHRtO9-lOeRehnQv0jUvlm_Zd3-2dV81I2nIuyTiXqzAv8MpHgbGQS7VLB2zg","allShortcutsEnabled":false,"treeExpanded":true,"path":"/","symbolsExpanded":false,"refInfo":{"name":"master","listCacheKey":"v0:1769088140.0","canEdit":false,"currentOid":"de1eac2ea5646a69a0c25672bb668d1ee1330cbf"},"helpUrl":"https://docs.github.com","findFileWorkerPath":"/assets-cdn/worker/find-file-worker-0b770463abc25631.js","findInFileWorkerPath":"/assets-cdn/worker/find-in-file-worker-4fc52606f41674c5.js","githubDevUrl":null},"csrf_tokens":{"/Keyang/node-csvtojson/branches":{"post":"aZ4ohcLAeMT_Mnuxcs3MsoX6dn1Np_R3ghau4ezAKKbBcIsl-HtA-xT31vPaTUQk88MS3_a8fBsgHXa86UJ96g"}}},"title":"GitHub - Keyang/node-csvtojson: Blazing fast and Comprehensive CSV Parser for Node.JS / Browser / Command Line.","appPayload":{},"meta":{"title":"GitHub - Keyang/node-csvtojson: Blazing fast and Comprehensive CSV Parser for Node.JS / Browser / Command Line."}}</script>
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<h1 class='sr-only'>Keyang/node-csvtojson</h1>


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<div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">CSVTOJSON</h1><a id="user-content-csvtojson" class="anchor" aria-label="Permalink: CSVTOJSON" href="#csvtojson"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>csvtojson</code> module is a comprehensive nodejs csv parser to convert csv to json or column arrays. It can be used as node.js library / command line tool / or in browser. Below are some features:</p>
<ul dir="auto">
<li>Strictly follow CSV definition <a href="https://www.loc.gov/preservation/digital/formats/fdd/fdd000323.shtml" rel="nofollow">RFC4180</a></li>
<li>Work with millions of lines of CSV data</li>
<li>Provide comprehensive parsing parameters</li>
<li>Provide out of box CSV parsing tool for Command Line</li>
<li>Blazing fast -- <a href="https://github.com/Keyang/csvbench">Focus on performance</a></li>
<li>Give flexibility to developer with 'pre-defined' helpers</li>
<li>Allow async / streaming parsing</li>
<li>Provide a csv parser for both Node.JS and browsers</li>
<li>Easy to use API</li>
</ul>
<div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">csvtojson online</h1><a id="user-content-csvtojson-online" class="anchor" aria-label="Permalink: csvtojson online" href="#csvtojson-online"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><a href="http://keyangxiang.com/csvtojson/" rel="nofollow">Here</a> is a free online csv to json convert service utilizing latest <code>csvtojson</code> module.</p>
<div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Upgrade to V2</h1><a id="user-content-upgrade-to-v2" class="anchor" aria-label="Permalink: Upgrade to V2" href="#upgrade-to-v2"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>csvtojson</code> has released version <code>2.0.0</code>.</p>
<ul dir="auto">
<li>To upgrade to v2, please follow <a href="https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md">upgrading guide</a></li>
<li>If you are looking for documentation for <code>v1</code>, open <a href="https://github.com/Keyang/node-csvtojson/blob/master/docs/readme.v1.md">this page</a></li>
</ul>
<p dir="auto">It is still able to use v1 with <code>csvtojson@2.0.0</code></p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// v1
const csvtojsonV1=require(&quot;csvtojson/v1&quot;);
// v2
const csvtojsonV2=require(&quot;csvtojson&quot;);
const csvtojsonV2=require(&quot;csvtojson/v2&quot;);
"><pre><span class="pl-c">// v1</span>
<span class="pl-k">const</span> <span class="pl-s1">csvtojsonV1</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">"csvtojson/v1"</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
<span class="pl-c">// v2</span>
<span class="pl-k">const</span> <span class="pl-s1">csvtojsonV2</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">"csvtojson"</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
<span class="pl-k">const</span> <span class="pl-s1">csvtojsonV2</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">"csvtojson/v2"</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div>
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<li><a href="#quick-start">Quick Start</a></li>
<li><a href="#api">API</a></li>
<li><a href="#browser-usage">Browser Usage</a></li>
<li><a href="#contribution">Contribution</a></li>
</ul>
<div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Quick Start</h1><a id="user-content-quick-start" class="anchor" aria-label="Permalink: Quick Start" href="#quick-start"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<ul dir="auto">
<li><a href="#library">As Library</a></li>
<li><a href="#command-line-usage">As Command Line Tool</a></li>
</ul>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Library</h2><a id="user-content-library" class="anchor" aria-label="Permalink: Library" href="#library"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Installation</h3><a id="user-content-installation" class="anchor" aria-label="Permalink: Installation" href="#installation"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="npm i --save csvtojson"><pre class="notranslate"><code>npm i --save csvtojson
</code></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">From CSV File to JSON Array</h3><a id="user-content-from-csv-file-to-json-array" class="anchor" aria-label="Permalink: From CSV File to JSON Array" href="#from-csv-file-to-json-array"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="/** csv file
a,b,c
1,2,3
4,5,6
*/
const csvFilePath='&lt;path to csv file&gt;'
const csv=require('csvtojson')
csv()
.fromFile(csvFilePath)
.then((jsonObj)=&gt;{
	console.log(jsonObj);
	/**
	 * [
	 * 	{a:&quot;1&quot;, b:&quot;2&quot;, c:&quot;3&quot;},
	 * 	{a:&quot;4&quot;, b:&quot;5&quot;. c:&quot;6&quot;}
	 * ]
	 */ 
})

// Async / await usage
const jsonArray=await csv().fromFile(csvFilePath);
"><pre><span class="pl-c">/** csv file</span>
<span class="pl-c">a,b,c</span>
<span class="pl-c">1,2,3</span>
<span class="pl-c">4,5,6</span>
<span class="pl-c">*/</span>
<span class="pl-k">const</span> <span class="pl-s1">csvFilePath</span><span class="pl-c1">=</span><span class="pl-s">'&lt;path to csv file&gt;'</span>
<span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromFile</span><span class="pl-kos">(</span><span class="pl-s1">csvFilePath</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">then</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-smi">console</span><span class="pl-kos">.</span><span class="pl-en">log</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
	<span class="pl-c">/**</span>
<span class="pl-c">	 * [</span>
<span class="pl-c">	 * 	{a:"1", b:"2", c:"3"},</span>
<span class="pl-c">	 * 	{a:"4", b:"5". c:"6"}</span>
<span class="pl-c">	 * ]</span>
<span class="pl-c">	 */</span> 
<span class="pl-kos">}</span><span class="pl-kos">)</span>

<span class="pl-c">// Async / await usage</span>
<span class="pl-k">const</span> <span class="pl-s1">jsonArray</span><span class="pl-c1">=</span><span class="pl-k">await</span> <span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">fromFile</span><span class="pl-kos">(</span><span class="pl-s1">csvFilePath</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">From CSV String to CSV Row</h3><a id="user-content-from-csv-string-to-csv-row" class="anchor" aria-label="Permalink: From CSV String to CSV Row" href="#from-csv-string-to-csv-row"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="/**
csvStr:
1,2,3
4,5,6
7,8,9
*/
const csv=require('csvtojson')
csv({
	noheader:true,
	output: &quot;csv&quot;
})
.fromString(csvStr)
.then((csvRow)=&gt;{ 
	console.log(csvRow) // =&gt; [[&quot;1&quot;,&quot;2&quot;,&quot;3&quot;], [&quot;4&quot;,&quot;5&quot;,&quot;6&quot;], [&quot;7&quot;,&quot;8&quot;,&quot;9&quot;]]
})
"><pre><span class="pl-c">/**</span>
<span class="pl-c">csvStr:</span>
<span class="pl-c">1,2,3</span>
<span class="pl-c">4,5,6</span>
<span class="pl-c">7,8,9</span>
<span class="pl-c">*/</span>
<span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">noheader</span>:<span class="pl-c1">true</span><span class="pl-kos">,</span>
	<span class="pl-c1">output</span>: <span class="pl-s">"csv"</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromString</span><span class="pl-kos">(</span><span class="pl-s1">csvStr</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">then</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">csvRow</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span> 
	<span class="pl-smi">console</span><span class="pl-kos">.</span><span class="pl-en">log</span><span class="pl-kos">(</span><span class="pl-s1">csvRow</span><span class="pl-kos">)</span> <span class="pl-c">// =&gt; [["1","2","3"], ["4","5","6"], ["7","8","9"]]</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Asynchronously process each line from csv url</h3><a id="user-content-asynchronously-process-each-line-from-csv-url" class="anchor" aria-label="Permalink: Asynchronously process each line from csv url" href="#asynchronously-process-each-line-from-csv-url"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const request=require('request')
const csv=require('csvtojson')

csv()
.fromStream(request.get('http://mywebsite.com/mycsvfile.csv'))
.subscribe((json)=&gt;{
	return new Promise((resolve,reject)=&gt;{
		// long operation for each json e.g. transform / write into database.
	})
},onError,onComplete);
"><pre><span class="pl-k">const</span> <span class="pl-s1">request</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'request'</span><span class="pl-kos">)</span>
<span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>

<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromStream</span><span class="pl-kos">(</span><span class="pl-s1">request</span><span class="pl-kos">.</span><span class="pl-en">get</span><span class="pl-kos">(</span><span class="pl-s">'http://mywebsite.com/mycsvfile.csv'</span><span class="pl-kos">)</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">subscribe</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">json</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-v">Promise</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">resolve</span><span class="pl-kos">,</span><span class="pl-s1">reject</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
		<span class="pl-c">// long operation for each json e.g. transform / write into database.</span>
	<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">}</span><span class="pl-kos">,</span><span class="pl-s1">onError</span><span class="pl-kos">,</span><span class="pl-s1">onComplete</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Convert to CSV lines</h3><a id="user-content-convert-to-csv-lines" class="anchor" aria-label="Permalink: Convert to CSV lines" href="#convert-to-csv-lines"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="/**
csvStr:
a,b,c
1,2,3
4,5,6
*/

const csv=require('csvtojson')
csv({output:&quot;line&quot;})
.fromString(csvStr)
.subscribe((csvLine)=&gt;{ 
	// csvLine =&gt;  &quot;1,2,3&quot; and &quot;4,5,6&quot;
})"><pre><span class="pl-c">/**</span>
<span class="pl-c">csvStr:</span>
<span class="pl-c">a,b,c</span>
<span class="pl-c">1,2,3</span>
<span class="pl-c">4,5,6</span>
<span class="pl-c">*/</span>

<span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span><span class="pl-c1">output</span>:<span class="pl-s">"line"</span><span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromString</span><span class="pl-kos">(</span><span class="pl-s1">csvStr</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">subscribe</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">csvLine</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span> 
	<span class="pl-c">// csvLine =&gt;  "1,2,3" and "4,5,6"</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Use Stream</h3><a id="user-content-use-stream" class="anchor" aria-label="Permalink: Use Stream" href="#use-stream"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson');

const readStream=require('fs').createReadStream(csvFilePath);

const writeStream=request.put('http://mysite.com/obj.json');

readStream.pipe(csv()).pipe(writeStream);
"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span><span class="pl-kos">;</span>

<span class="pl-k">const</span> <span class="pl-s1">readStream</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'fs'</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">createReadStream</span><span class="pl-kos">(</span><span class="pl-s1">csvFilePath</span><span class="pl-kos">)</span><span class="pl-kos">;</span>

<span class="pl-k">const</span> <span class="pl-s1">writeStream</span><span class="pl-c1">=</span><span class="pl-s1">request</span><span class="pl-kos">.</span><span class="pl-en">put</span><span class="pl-kos">(</span><span class="pl-s">'http://mysite.com/obj.json'</span><span class="pl-kos">)</span><span class="pl-kos">;</span>

<span class="pl-s1">readStream</span><span class="pl-kos">.</span><span class="pl-en">pipe</span><span class="pl-kos">(</span><span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">pipe</span><span class="pl-kos">(</span><span class="pl-s1">writeStream</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div>
<p dir="auto">To find more detailed usage, please see <a href="#api">API</a> section</p>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Command Line Usage</h2><a id="user-content-command-line-usage" class="anchor" aria-label="Permalink: Command Line Usage" href="#command-line-usage"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Installation</h3><a id="user-content-installation-1" class="anchor" aria-label="Permalink: Installation" href="#installation-1"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ npm i -g csvtojson"><pre class="notranslate"><code>$ npm i -g csvtojson
</code></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Usage</h3><a id="user-content-usage" class="anchor" aria-label="Permalink: Usage" href="#usage"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ csvtojson [options] &lt;csv file path&gt;"><pre class="notranslate"><code>$ csvtojson [options] &lt;csv file path&gt;
</code></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Example</h3><a id="user-content-example" class="anchor" aria-label="Permalink: Example" href="#example"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">Convert csv file and save result to json file:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ csvtojson source.csv &gt; converted.json"><pre class="notranslate"><code>$ csvtojson source.csv &gt; converted.json
</code></pre></div>
<p dir="auto">Pipe in csv data:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ cat ./source.csv | csvtojson &gt; converted.json"><pre class="notranslate"><code>$ cat ./source.csv | csvtojson &gt; converted.json
</code></pre></div>
<p dir="auto">Print Help:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ csvtojson"><pre class="notranslate"><code>$ csvtojson
</code></pre></div>
<div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">API</h1><a id="user-content-api" class="anchor" aria-label="Permalink: API" href="#api"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<ul dir="auto">
<li><a href="#parameters">Parameters</a></li>
<li><a href="#asynchronous-result-process">Asynchronous Result Process</a></li>
<li><a href="#events">Events</a></li>
<li><a href="#hook--transform">Hook / Transform</a></li>
<li><a href="#nested-json-structure">Nested JSON Structure</a></li>
<li><a href="#header-row">Header Row</a></li>
<li><a href="#column-parser">Column Parser</a></li>
</ul>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Parameters</h2><a id="user-content-parameters" class="anchor" aria-label="Permalink: Parameters" href="#parameters"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>require('csvtojson')</code> returns a constructor function which takes 2 arguments:</p>
<ol dir="auto">
<li>Parser parameters</li>
<li>Stream options</li>
</ol>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
const converter=csv(parserParameters, streamOptions)"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-k">const</span> <span class="pl-s1">converter</span><span class="pl-c1">=</span><span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-s1">parserParameters</span><span class="pl-kos">,</span> <span class="pl-s1">streamOptions</span><span class="pl-kos">)</span></pre></div>
<p dir="auto">Both arguments are optional.</p>
<p dir="auto">For <code>Stream Options</code> please read <a href="https://nodejs.org/api/stream.html#stream_new_stream_transform_options" rel="nofollow">Stream Option</a> from Node.JS</p>
<p dir="auto"><code>parserParameters</code> is a JSON object like:</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const converter=csv({
	noheader:true,
	trim:true,
})"><pre><span class="pl-k">const</span> <span class="pl-s1">converter</span><span class="pl-c1">=</span><span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">noheader</span>:<span class="pl-c1">true</span><span class="pl-kos">,</span>
	<span class="pl-c1">trim</span>:<span class="pl-c1">true</span><span class="pl-kos">,</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<p dir="auto">Following parameters are supported:</p>
<ul dir="auto">
<li><strong>output</strong>: The format to be converted to. "json" (default) -- convert csv to json. "csv" -- convert csv to csv row array. "line" -- convert csv to csv line string</li>
<li><strong>delimiter</strong>: delimiter used for separating columns. Use "auto" if delimiter is unknown in advance, in this case, delimiter will be auto-detected (by best attempt). Use an array to give a list of potential delimiters e.g. [",","|","$"]. default: ","</li>
<li><strong>quote</strong>: If a column contains delimiter, it is able to use quote character to surround the column content. e.g. "hello, world" won't be split into two columns while parsing. Set to "off" will ignore all quotes. default: " (double quote)</li>
<li><strong>trim</strong>: Indicate if parser trim off spaces surrounding column content. e.g. "  content  " will be trimmed to "content". Default: true</li>
<li><strong>checkType</strong>: This parameter turns on and off whether check field type. Default is false. (The default is <code>true</code> if version &lt; 1.1.4)</li>
<li><strong>ignoreEmpty</strong>: Ignore the empty value in CSV columns. If a column value is not given, set this to true to skip them. Default: false.</li>
<li><strong>fork (experimental)</strong>: Fork another process to parse the CSV stream. It is effective if many concurrent parsing sessions for large csv files. Default: false</li>
<li><strong>noheader</strong>:Indicating csv data has no header row and first row is data row. Default is false. See <a href="#header-row">header row</a></li>
<li><strong>headers</strong>: An array to specify the headers of CSV data. If --noheader is false, this value will override CSV header row. Default: null. Example: ["my field","name"]. See <a href="#header-row">header row</a></li>
<li><strong>flatKeys</strong>: Don't interpret dots (.) and square brackets in header fields as nested object or array identifiers at all (treat them like regular characters for JSON field identifiers). Default: false.</li>
<li><strong>maxRowLength</strong>: the max character a csv row could have. 0 means infinite. If max number exceeded, parser will emit "error" of "row_exceed". if a possibly corrupted csv data provided, give it a number like 65535 so the parser won't consume memory. default: 0</li>
<li><strong>checkColumn</strong>: whether check column number of a row is the same as headers. If column number mismatched headers number, an error of "mismatched_column" will be emitted.. default: false</li>
<li><strong>eol</strong>: End of line character. If omitted, parser will attempt to retrieve it from the first chunks of CSV data.</li>
<li><strong>escape</strong>: escape character used in quoted column. Default is double quote (") according to RFC4108. Change to back slash (\) or other chars for your own case.</li>
<li><strong>includeColumns</strong>: This parameter instructs the parser to include only those columns as specified by the regular expression. Example: /(name|age)/ will parse and include columns whose header contains "name" or "age"</li>
<li><strong>ignoreColumns</strong>: This parameter instructs the parser to ignore columns as specified by the regular expression. Example: /(name|age)/ will ignore columns whose header contains "name" or "age"</li>
<li><strong>colParser</strong>: Allows override parsing logic for a specific column. It accepts a JSON object with fields like: <code>headName: &lt;String | Function | ColParser&gt;</code> . e.g. {field1:'number'} will use built-in number parser to convert value of the <code>field1</code> column to number. For more information See <a href="#column-parser">details below</a></li>
<li><strong>alwaysSplitAtEOL</strong>: Always interpret each line (as defined by <code>eol</code> like <code>\n</code>) as a row. This will prevent <code>eol</code> characters from being used within a row (even inside a quoted field). Default is false. Change to true if you are confident no inline line breaks (like line break in a cell which has multi line text).</li>
<li><strong>nullObject</strong>: How to parse if a csv cell contains "null". Default false will keep "null" as string. Change to true if a null object is needed.</li>
<li><strong>downstreamFormat</strong>: Option to set what JSON array format is needed by downstream. "line" is also called ndjson format. This format will write lines of JSON (without square brackets and commas) to downstream. "array" will write complete JSON array string to downstream (suitable for file writable stream etc). Default "line"</li>
<li><strong>needEmitAll</strong>: Parser will build JSON result if <code>.then</code> is called (or await is used). If this is not desired, set this to false. Default is true.
All parameters can be used in Command Line tool.</li>
</ul>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Asynchronous Result Process</h2><a id="user-content-asynchronous-result-process" class="anchor" aria-label="Permalink: Asynchronous Result Process" href="#asynchronous-result-process"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">Since <code>v2.0.0</code>, asynchronous processing has been fully supported.</p>
<p dir="auto">e.g. Process each JSON result asynchronously.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="csv().fromFile(csvFile)
.subscribe((json)=&gt;{
	return new Promise((resolve,reject)=&gt;{
		// Async operation on the json
		// don't forget to call resolve and reject
	})
})"><pre><span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">fromFile</span><span class="pl-kos">(</span><span class="pl-s1">csvFile</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">subscribe</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">json</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-v">Promise</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">resolve</span><span class="pl-kos">,</span><span class="pl-s1">reject</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
		<span class="pl-c">// Async operation on the json</span>
		<span class="pl-c">// don't forget to call resolve and reject</span>
	<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<p dir="auto">For more details please read:</p>
<ul dir="auto">
<li><a href="https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md#add-promise-and-async--await-support">Add Promise and Async / Await support</a></li>
<li><a href="https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md#add-asynchronous-line-by-line-processing-support">Add asynchronous line by line processing support</a></li>
<li><a href="https://github.com/Keyang/node-csvtojson/blob/master/docs/csvtojson-v2.md#async-hooks-support">Async Hooks Support</a></li>
</ul>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Events</h2><a id="user-content-events" class="anchor" aria-label="Permalink: Events" href="#events"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>Converter</code> class defined a series of events.</p>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">header</h3><a id="user-content-header" class="anchor" aria-label="Permalink: header" href="#header"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>header</code> event is emitted for each CSV file once. It passes an array object which contains the names of the header row.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
csv()
.on('header',(header)=&gt;{
	//header=&gt; [header1, header2, header3]
})"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">on</span><span class="pl-kos">(</span><span class="pl-s">'header'</span><span class="pl-kos">,</span><span class="pl-kos">(</span><span class="pl-s1">header</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-c">//header=&gt; [header1, header2, header3]</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<p dir="auto"><code>header</code> is always an array of strings without types.</p>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">data</h3><a id="user-content-data" class="anchor" aria-label="Permalink: data" href="#data"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>data</code> event is emitted for each parsed CSV line. It passes buffer of stringified JSON in <a href="http://ndjson.org/" rel="nofollow">ndjson format</a> unless <code>objectMode</code> is set true in stream option.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
csv()
.on('data',(data)=&gt;{
	//data is a buffer object
	const jsonStr= data.toString('utf8')
})"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">on</span><span class="pl-kos">(</span><span class="pl-s">'data'</span><span class="pl-kos">,</span><span class="pl-kos">(</span><span class="pl-s1">data</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-c">//data is a buffer object</span>
	<span class="pl-k">const</span> <span class="pl-s1">jsonStr</span><span class="pl-c1">=</span> <span class="pl-s1">data</span><span class="pl-kos">.</span><span class="pl-en">toString</span><span class="pl-kos">(</span><span class="pl-s">'utf8'</span><span class="pl-kos">)</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">error</h3><a id="user-content-error" class="anchor" aria-label="Permalink: error" href="#error"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>error</code> event is emitted if any errors happened during parsing.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
csv()
.on('error',(err)=&gt;{
	console.log(err)
})"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">on</span><span class="pl-kos">(</span><span class="pl-s">'error'</span><span class="pl-kos">,</span><span class="pl-kos">(</span><span class="pl-s1">err</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-smi">console</span><span class="pl-kos">.</span><span class="pl-en">log</span><span class="pl-kos">(</span><span class="pl-s1">err</span><span class="pl-kos">)</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<p dir="auto">Note that if <code>error</code> being emitted, the process will stop as node.js will automatically <code>unpipe()</code> upper-stream and chained down-stream<sup>1</sup>. This will cause <code>end</code> event never being emitted because <code>end</code> event is only emitted when all data being consumed <sup>2</sup>. If need to know when parsing finished, use <code>done</code> event instead of <code>end</code>.</p>
<ol dir="auto">
<li><a href="https://github.com/nodejs/node/blob/master/lib/_stream_readable.js#L572-L583">Node.JS Readable Stream</a></li>
<li><a href="https://nodejs.org/api/stream.html#stream_event_end" rel="nofollow">Writable end Event</a></li>
</ol>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">done</h3><a id="user-content-done" class="anchor" aria-label="Permalink: done" href="#done"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>done</code> event is emitted either after parsing successfully finished or any error happens. This indicates the processor has stopped.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
csv()
.on('done',(error)=&gt;{
	//do some stuff
})"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">on</span><span class="pl-kos">(</span><span class="pl-s">'done'</span><span class="pl-kos">,</span><span class="pl-kos">(</span><span class="pl-s1">error</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-c">//do some stuff</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<p dir="auto">if any error during parsing, it will be passed in callback.</p>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Hook &amp; Transform</h2><a id="user-content-hook--transform" class="anchor" aria-label="Permalink: Hook &amp; Transform" href="#hook--transform"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Raw CSV Data Hook</h3><a id="user-content-raw-csv-data-hook" class="anchor" aria-label="Permalink: Raw CSV Data Hook" href="#raw-csv-data-hook"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">the hook -- <code>preRawData</code> will be called with csv string passed to parser.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
// synchronous
csv()
.preRawData((csvRawData)=&gt;{
	var newData=csvRawData.replace('some value','another value');
	return newData;
})

// asynchronous
csv()
.preRawData((csvRawData)=&gt;{
	return new Promise((resolve,reject)=&gt;{
		var newData=csvRawData.replace('some value','another value');
		resolve(newData);
	})
	
})"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-c">// synchronous</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">preRawData</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">csvRawData</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-k">var</span> <span class="pl-s1">newData</span><span class="pl-c1">=</span><span class="pl-s1">csvRawData</span><span class="pl-kos">.</span><span class="pl-en">replace</span><span class="pl-kos">(</span><span class="pl-s">'some value'</span><span class="pl-kos">,</span><span class="pl-s">'another value'</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
	<span class="pl-k">return</span> <span class="pl-s1">newData</span><span class="pl-kos">;</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>

<span class="pl-c">// asynchronous</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">preRawData</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">csvRawData</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-v">Promise</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">resolve</span><span class="pl-kos">,</span><span class="pl-s1">reject</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
		<span class="pl-k">var</span> <span class="pl-s1">newData</span><span class="pl-c1">=</span><span class="pl-s1">csvRawData</span><span class="pl-kos">.</span><span class="pl-en">replace</span><span class="pl-kos">(</span><span class="pl-s">'some value'</span><span class="pl-kos">,</span><span class="pl-s">'another value'</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
		<span class="pl-s1">resolve</span><span class="pl-kos">(</span><span class="pl-s1">newData</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
	<span class="pl-kos">}</span><span class="pl-kos">)</span>
	
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">CSV File Line Hook</h3><a id="user-content-csv-file-line-hook" class="anchor" aria-label="Permalink: CSV File Line Hook" href="#csv-file-line-hook"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">The function is called each time a file line has been parsed in csv stream. The <code>lineIdx</code> is the file line number in the file starting with 0.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
// synchronous
csv()
.preFileLine((fileLineString, lineIdx)=&gt;{
	if (lineIdx === 2){
		return fileLineString.replace('some value','another value')
	}
	return fileLineString
})

// asynchronous
csv()
.preFileLine((fileLineString, lineIdx)=&gt;{
	return new Promise((resolve,reject)=&gt;{
			// async function processing the data.
	})
	
	
})"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-c">// synchronous</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">preFileLine</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">fileLineString</span><span class="pl-kos">,</span> <span class="pl-s1">lineIdx</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-k">if</span> <span class="pl-kos">(</span><span class="pl-s1">lineIdx</span> <span class="pl-c1">===</span> <span class="pl-c1">2</span><span class="pl-kos">)</span><span class="pl-kos">{</span>
		<span class="pl-k">return</span> <span class="pl-s1">fileLineString</span><span class="pl-kos">.</span><span class="pl-en">replace</span><span class="pl-kos">(</span><span class="pl-s">'some value'</span><span class="pl-kos">,</span><span class="pl-s">'another value'</span><span class="pl-kos">)</span>
	<span class="pl-kos">}</span>
	<span class="pl-k">return</span> <span class="pl-s1">fileLineString</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>

<span class="pl-c">// asynchronous</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">preFileLine</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">fileLineString</span><span class="pl-kos">,</span> <span class="pl-s1">lineIdx</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-v">Promise</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">resolve</span><span class="pl-kos">,</span><span class="pl-s1">reject</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
			<span class="pl-c">// async function processing the data.</span>
	<span class="pl-kos">}</span><span class="pl-kos">)</span>
	
	
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Result transform</h3><a id="user-content-result-transform" class="anchor" aria-label="Permalink: Result transform" href="#result-transform"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">To transform result that is sent to downstream, use <code>.subscribe</code> method for each json populated.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="const csv=require('csvtojson')
csv()
.subscribe((jsonObj,index)=&gt;{
	jsonObj.myNewKey='some value'
	// OR asynchronously
	return new Promise((resolve,reject)=&gt;{
		jsonObj.myNewKey='some value';
		resolve();
	})
})
.on('data',(jsonObj)=&gt;{
	console.log(jsonObj.myNewKey) // some value
});"><pre><span class="pl-k">const</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">'csvtojson'</span><span class="pl-kos">)</span>
<span class="pl-s1">csv</span><span class="pl-kos">(</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">subscribe</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">,</span><span class="pl-s1">index</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-s1">jsonObj</span><span class="pl-kos">.</span><span class="pl-c1">myNewKey</span><span class="pl-c1">=</span><span class="pl-s">'some value'</span>
	<span class="pl-c">// OR asynchronously</span>
	<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-v">Promise</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">resolve</span><span class="pl-kos">,</span><span class="pl-s1">reject</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
		<span class="pl-s1">jsonObj</span><span class="pl-kos">.</span><span class="pl-c1">myNewKey</span><span class="pl-c1">=</span><span class="pl-s">'some value'</span><span class="pl-kos">;</span>
		<span class="pl-s1">resolve</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
	<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">on</span><span class="pl-kos">(</span><span class="pl-s">'data'</span><span class="pl-kos">,</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-smi">console</span><span class="pl-kos">.</span><span class="pl-en">log</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">.</span><span class="pl-c1">myNewKey</span><span class="pl-kos">)</span> <span class="pl-c">// some value</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Nested JSON Structure</h2><a id="user-content-nested-json-structure" class="anchor" aria-label="Permalink: Nested JSON Structure" href="#nested-json-structure"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>csvtojson</code> is able to convert csv line to a nested JSON by correctly defining its csv header row. This is default out-of-box feature.</p>
<p dir="auto">Here is an example. Original CSV:</p>
<div class="highlight highlight-source-csv notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="fieldA.title, fieldA.children.0.name, fieldA.children.0.id,fieldA.children.1.name, fieldA.children.1.employee.0.name,fieldA.children.1.employee.1.name, fieldA.address.0,fieldA.address.1, description
Food Factory, Oscar, 0023, Tikka, Tim, Joe, 3 Lame Road, Grantstown, A fresh new food factory
Kindom Garden, Ceil, 54, Pillow, Amst, Tom, 24 Shaker Street, HelloTown, Awesome castle
"><pre><span class="pl-en">fieldA.title</span><span class="pl-k">,</span> <span class="pl-en">fieldA.children.0.name</span><span class="pl-k">,</span> <span class="pl-en">fieldA.children.0.id</span><span class="pl-k">,</span><span class="pl-en">fieldA.children.1.name</span><span class="pl-k">,</span> <span class="pl-en">fieldA.children.1.employee.0.name</span><span class="pl-k">,</span><span class="pl-en">fieldA.children.1.employee.1.name</span><span class="pl-k">,</span> <span class="pl-en">fieldA.address.0</span><span class="pl-k">,</span><span class="pl-en">fieldA.address.1</span><span class="pl-k">,</span> <span class="pl-en">description</span>
<span class="pl-s">Food Factory</span><span class="pl-k">,</span> <span class="pl-s">Oscar</span><span class="pl-k">,</span> <span class="pl-s">0023</span><span class="pl-k">,</span> <span class="pl-s">Tikka</span><span class="pl-k">,</span> <span class="pl-s">Tim</span><span class="pl-k">,</span> <span class="pl-s">Joe</span><span class="pl-k">,</span> <span class="pl-s">3 Lame Road</span><span class="pl-k">,</span> <span class="pl-s">Grantstown</span><span class="pl-k">,</span> <span class="pl-s">A fresh new food factory</span>
<span class="pl-s">Kindom Garden</span><span class="pl-k">,</span> <span class="pl-s">Ceil</span><span class="pl-k">,</span> <span class="pl-s">54</span><span class="pl-k">,</span> <span class="pl-s">Pillow</span><span class="pl-k">,</span> <span class="pl-s">Amst</span><span class="pl-k">,</span> <span class="pl-s">Tom</span><span class="pl-k">,</span> <span class="pl-s">24 Shaker Street</span><span class="pl-k">,</span> <span class="pl-s">HelloTown</span><span class="pl-k">,</span> <span class="pl-s">Awesome castle</span>
</pre></div>
<p dir="auto">The data above contains nested JSON including nested array of JSON objects and plain texts.</p>
<p dir="auto">Using csvtojson to convert, the result would be like:</p>
<div class="highlight highlight-source-json notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="[{
    &quot;fieldA&quot;: {
        &quot;title&quot;: &quot;Food Factory&quot;,
        &quot;children&quot;: [{
            &quot;name&quot;: &quot;Oscar&quot;,
            &quot;id&quot;: &quot;0023&quot;
        }, {
            &quot;name&quot;: &quot;Tikka&quot;,
            &quot;employee&quot;: [{
                &quot;name&quot;: &quot;Tim&quot;
            }, {
                &quot;name&quot;: &quot;Joe&quot;
            }]
        }],
        &quot;address&quot;: [&quot;3 Lame Road&quot;, &quot;Grantstown&quot;]
    },
    &quot;description&quot;: &quot;A fresh new food factory&quot;
}, {
    &quot;fieldA&quot;: {
        &quot;title&quot;: &quot;Kindom Garden&quot;,
        &quot;children&quot;: [{
            &quot;name&quot;: &quot;Ceil&quot;,
            &quot;id&quot;: &quot;54&quot;
        }, {
            &quot;name&quot;: &quot;Pillow&quot;,
            &quot;employee&quot;: [{
                &quot;name&quot;: &quot;Amst&quot;
            }, {
                &quot;name&quot;: &quot;Tom&quot;
            }]
        }],
        &quot;address&quot;: [&quot;24 Shaker Street&quot;, &quot;HelloTown&quot;]
    },
    &quot;description&quot;: &quot;Awesome castle&quot;
}]"><pre>[{
    <span class="pl-ent">"fieldA"</span>: {
        <span class="pl-ent">"title"</span>: <span class="pl-s"><span class="pl-pds">"</span>Food Factory<span class="pl-pds">"</span></span>,
        <span class="pl-ent">"children"</span>: [{
            <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Oscar<span class="pl-pds">"</span></span>,
            <span class="pl-ent">"id"</span>: <span class="pl-s"><span class="pl-pds">"</span>0023<span class="pl-pds">"</span></span>
        }, {
            <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Tikka<span class="pl-pds">"</span></span>,
            <span class="pl-ent">"employee"</span>: [{
                <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Tim<span class="pl-pds">"</span></span>
            }, {
                <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Joe<span class="pl-pds">"</span></span>
            }]
        }],
        <span class="pl-ent">"address"</span>: [<span class="pl-s"><span class="pl-pds">"</span>3 Lame Road<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>Grantstown<span class="pl-pds">"</span></span>]
    },
    <span class="pl-ent">"description"</span>: <span class="pl-s"><span class="pl-pds">"</span>A fresh new food factory<span class="pl-pds">"</span></span>
}, {
    <span class="pl-ent">"fieldA"</span>: {
        <span class="pl-ent">"title"</span>: <span class="pl-s"><span class="pl-pds">"</span>Kindom Garden<span class="pl-pds">"</span></span>,
        <span class="pl-ent">"children"</span>: [{
            <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Ceil<span class="pl-pds">"</span></span>,
            <span class="pl-ent">"id"</span>: <span class="pl-s"><span class="pl-pds">"</span>54<span class="pl-pds">"</span></span>
        }, {
            <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Pillow<span class="pl-pds">"</span></span>,
            <span class="pl-ent">"employee"</span>: [{
                <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Amst<span class="pl-pds">"</span></span>
            }, {
                <span class="pl-ent">"name"</span>: <span class="pl-s"><span class="pl-pds">"</span>Tom<span class="pl-pds">"</span></span>
            }]
        }],
        <span class="pl-ent">"address"</span>: [<span class="pl-s"><span class="pl-pds">"</span>24 Shaker Street<span class="pl-pds">"</span></span>, <span class="pl-s"><span class="pl-pds">"</span>HelloTown<span class="pl-pds">"</span></span>]
    },
    <span class="pl-ent">"description"</span>: <span class="pl-s"><span class="pl-pds">"</span>Awesome castle<span class="pl-pds">"</span></span>
}]</pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Flat Keys</h3><a id="user-content-flat-keys" class="anchor" aria-label="Permalink: Flat Keys" href="#flat-keys"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">In order to not produce nested JSON, simply set <code>flatKeys:true</code> in parameters.</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="/**
csvStr:
a.b,a.c
1,2
*/
csv({flatKeys:true})
.fromString(csvStr)
.subscribe((jsonObj)=&gt;{
	//{&quot;a.b&quot;:1,&quot;a.c&quot;:2}  rather than  {&quot;a&quot;:{&quot;b&quot;:1,&quot;c&quot;:2}}
});
"><pre><span class="pl-c">/**</span>
<span class="pl-c">csvStr:</span>
<span class="pl-c">a.b,a.c</span>
<span class="pl-c">1,2</span>
<span class="pl-c">*/</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span><span class="pl-c1">flatKeys</span>:<span class="pl-c1">true</span><span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromString</span><span class="pl-kos">(</span><span class="pl-s1">csvStr</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">subscribe</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-c">//{"a.b":1,"a.c":2}  rather than  {"a":{"b":1,"c":2}}</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Header Row</h2><a id="user-content-header-row" class="anchor" aria-label="Permalink: Header Row" href="#header-row"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>csvtojson</code> uses csv header row as generator of JSON keys. However, it does not require the csv source containing a header row. There are 4 ways to define header rows:</p>
<ol dir="auto">
<li>First row of csv source. Use first row of csv source as header row. This is default.</li>
<li>If first row of csv source is header row but it is incorrect and need to be replaced. Use <code>headers:[]</code> and <code>noheader:false</code> parameters.</li>
<li>If original csv source has no header row but the header definition can be defined. Use <code>headers:[]</code> and <code>noheader:true</code> parameters.</li>
<li>If original csv source has no header row and the header definition is unknown. Use <code>noheader:true</code>. This will automatically add <code>fieldN</code> header to csv cells</li>
</ol>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Example</h3><a id="user-content-example-1" class="anchor" aria-label="Permalink: Example" href="#example-1"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="// replace header row (first row) from original source with 'header1, header2'
csv({
	noheader: false,
	headers: ['header1','header2']
})

// original source has no header row. add 'field1' 'field2' ... 'fieldN' as csv header
csv({
	noheader: true
})

// original source has no header row. use 'header1' 'header2' as its header row
csv({
	noheader: true,
	headers: ['header1','header2']
})
"><pre><span class="pl-c">// replace header row (first row) from original source with 'header1, header2'</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">noheader</span>: <span class="pl-c1">false</span><span class="pl-kos">,</span>
	<span class="pl-c1">headers</span>: <span class="pl-kos">[</span><span class="pl-s">'header1'</span><span class="pl-kos">,</span><span class="pl-s">'header2'</span><span class="pl-kos">]</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>

<span class="pl-c">// original source has no header row. add 'field1' 'field2' ... 'fieldN' as csv header</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">noheader</span>: <span class="pl-c1">true</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>

<span class="pl-c">// original source has no header row. use 'header1' 'header2' as its header row</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">noheader</span>: <span class="pl-c1">true</span><span class="pl-kos">,</span>
	<span class="pl-c1">headers</span>: <span class="pl-kos">[</span><span class="pl-s">'header1'</span><span class="pl-kos">,</span><span class="pl-s">'header2'</span><span class="pl-kos">]</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Column Parser</h2><a id="user-content-column-parser" class="anchor" aria-label="Permalink: Column Parser" href="#column-parser"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>Column Parser</code> allows writing a custom parser for a column in CSV data.</p>
<p dir="auto"><strong>What is Column Parser</strong></p>
<p dir="auto">When <code>csvtojson</code> walks through csv data, it converts value in a cell to something else. For example, if <code>checkType</code> is <code>true</code>, <code>csvtojson</code> will attempt to find a proper type parser according to the cell value. That is, if cell value is "5", a <code>numberParser</code> will be used and all value under that column will use the <code>numberParser</code> to transform data.</p>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Built-in parsers</h3><a id="user-content-built-in-parsers" class="anchor" aria-label="Permalink: Built-in parsers" href="#built-in-parsers"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">There are currently following built-in parser:</p>
<ul dir="auto">
<li>string: Convert value to string</li>
<li>number: Convert value to number</li>
<li>omit: omit the whole column</li>
</ul>
<p dir="auto">This will override types inferred from <code>checkType:true</code> parameter. More built-in parsers will be added as requested in <a href="https://github.com/Keyang/node-csvtojson/issues">issues page</a>.</p>
<p dir="auto">Example:</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="/*csv string
column1,column2
hello,1234
*/
csv({
	colParser:{
		&quot;column1&quot;:&quot;omit&quot;,
		&quot;column2&quot;:&quot;string&quot;,
	},
	checkType:true
})
.fromString(csvString)
.subscribe((jsonObj)=&gt;{
	//jsonObj: {column2:&quot;1234&quot;}
})"><pre><span class="pl-c">/*csv string</span>
<span class="pl-c">column1,column2</span>
<span class="pl-c">hello,1234</span>
<span class="pl-c">*/</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">colParser</span>:<span class="pl-kos">{</span>
		<span class="pl-s">"column1"</span>:<span class="pl-s">"omit"</span><span class="pl-kos">,</span>
		<span class="pl-s">"column2"</span>:<span class="pl-s">"string"</span><span class="pl-kos">,</span>
	<span class="pl-kos">}</span><span class="pl-kos">,</span>
	<span class="pl-c1">checkType</span>:<span class="pl-c1">true</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromString</span><span class="pl-kos">(</span><span class="pl-s1">csvString</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">subscribe</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-c">//jsonObj: {column2:"1234"}</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Custom parsers function</h3><a id="user-content-custom-parsers-function" class="anchor" aria-label="Permalink: Custom parsers function" href="#custom-parsers-function"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">Sometimes, developers want to define custom parser. It is able to pass a function to specific column in <code>colParser</code>.</p>
<p dir="auto">Example:</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="/*csv data
name, birthday
Joe, 1970-01-01
*/
csv({
	colParser:{
		&quot;birthday&quot;:function(item, head, resultRow, row , colIdx){
			/*
				item - &quot;1970-01-01&quot;
				head - &quot;birthday&quot;
				resultRow - {name:&quot;Joe&quot;}
				row - [&quot;Joe&quot;,&quot;1970-01-01&quot;]
				colIdx - 1
			*/
			return new Date(item);
		}
	}
})"><pre><span class="pl-c">/*csv data</span>
<span class="pl-c">name, birthday</span>
<span class="pl-c">Joe, 1970-01-01</span>
<span class="pl-c">*/</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">colParser</span>:<span class="pl-kos">{</span>
		<span class="pl-s">"birthday"</span>:<span class="pl-k">function</span><span class="pl-kos">(</span><span class="pl-s1">item</span><span class="pl-kos">,</span> <span class="pl-s1">head</span><span class="pl-kos">,</span> <span class="pl-s1">resultRow</span><span class="pl-kos">,</span> <span class="pl-s1">row</span> <span class="pl-kos">,</span> <span class="pl-s1">colIdx</span><span class="pl-kos">)</span><span class="pl-kos">{</span>
			<span class="pl-c">/*</span>
<span class="pl-c">				item - "1970-01-01"</span>
<span class="pl-c">				head - "birthday"</span>
<span class="pl-c">				resultRow - {name:"Joe"}</span>
<span class="pl-c">				row - ["Joe","1970-01-01"]</span>
<span class="pl-c">				colIdx - 1</span>
<span class="pl-c">			*/</span>
			<span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-v">Date</span><span class="pl-kos">(</span><span class="pl-s1">item</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
		<span class="pl-kos">}</span>
	<span class="pl-kos">}</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<p dir="auto">Above example will convert <code>birthday</code> column into a js <code>Date</code> object.</p>
<p dir="auto">The returned value will be used in result JSON object. Returning <code>undefined</code> will not change result JSON object.</p>
<div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Flat key column</h3><a id="user-content-flat-key-column" class="anchor" aria-label="Permalink: Flat key column" href="#flat-key-column"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">It is also able to mark a column as <code>flat</code>:</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="
/*csv string
person.comment,person.number
hello,1234
*/
csv({
	colParser:{
		&quot;person.number&quot;:{
			flat:true,
			cellParser: &quot;number&quot; // string or a function 
		}
	}
})
.fromString(csvString)
.subscribe((jsonObj)=&gt;{
	//jsonObj: {&quot;person.number&quot;:1234,&quot;person&quot;:{&quot;comment&quot;:&quot;hello&quot;}}
})"><pre><span class="pl-c">/*csv string</span>
<span class="pl-c">person.comment,person.number</span>
<span class="pl-c">hello,1234</span>
<span class="pl-c">*/</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">colParser</span>:<span class="pl-kos">{</span>
		<span class="pl-s">"person.number"</span>:<span class="pl-kos">{</span>
			<span class="pl-c1">flat</span>:<span class="pl-c1">true</span><span class="pl-kos">,</span>
			<span class="pl-c1">cellParser</span>: <span class="pl-s">"number"</span> <span class="pl-c">// string or a function </span>
		<span class="pl-kos">}</span>
	<span class="pl-kos">}</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromString</span><span class="pl-kos">(</span><span class="pl-s1">csvString</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">subscribe</span><span class="pl-kos">(</span><span class="pl-kos">(</span><span class="pl-s1">jsonObj</span><span class="pl-kos">)</span><span class="pl-c1">=&gt;</span><span class="pl-kos">{</span>
	<span class="pl-c">//jsonObj: {"person.number":1234,"person":{"comment":"hello"}}</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
<div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Contribution</h1><a id="user-content-contribution" class="anchor" aria-label="Permalink: Contribution" href="#contribution"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">Very much appreciate any types of donation and support.</p>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Code</h2><a id="user-content-code" class="anchor" aria-label="Permalink: Code" href="#code"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><code>csvtojson</code> follows github convention for contributions. Here are some steps:</p>
<ol dir="auto">
<li>Fork the repo to your github account</li>
<li>Checkout code from your github repo to your local machine.</li>
<li>Make code changes and don't forget add related tests.</li>
<li>Run <code>npm test</code> locally before pushing code back.</li>
<li>Create a <a href="https://help.github.com/articles/creating-a-pull-request/">Pull Request</a> on github.</li>
<li>Code review and merge</li>
<li>Changes will be published to NPM within next version.</li>
</ol>
<p dir="auto">Thanks all the <a href="https://github.com/Keyang/node-csvtojson/graphs/contributors">contributors</a></p>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Backers</h2><a id="user-content-backers" class="anchor" aria-label="Permalink: Backers" href="#backers"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">Thank you to all our backers! [<a href="https://opencollective.com/csvtojson#backer" rel="nofollow">Become a backer</a>]</p>
<p dir="auto"><a href="https://opencollective.com/csvtojson#backer" rel="nofollow"><img src="https://camo.githubusercontent.com/80fa4a517ed899da26b7e8a6bbe8618e1c38bccf34e6c9fbd5e7882dc98e972c/68747470733a2f2f6f70656e636f6c6c6563746976652e636f6d2f637376746f6a736f6e2f6261636b6572732e7376673f77696474683d383930" alt="OpenCollective" data-canonical-src="https://opencollective.com/csvtojson/backers.svg?width=890" style="max-width: 100%;"></a></p>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Sponsors</h2><a id="user-content-sponsors" class="anchor" aria-label="Permalink: Sponsors" href="#sponsors"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">Thank you to all our sponsors! (please ask your company to also support this open source project by <a href="https://opencollective.com/csvtojson#sponsor" rel="nofollow">becoming a sponsor</a>)</p>
<div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Paypal</h2><a id="user-content-paypal" class="anchor" aria-label="Permalink: Paypal" href="#paypal"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto"><a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&amp;hosted_button_id=DUBQLRPJADJFQ" rel="nofollow"><img src="https://camo.githubusercontent.com/7b6de155df30b37b25eb5fec52f9213680c3dbf067dfb7d7e2850ac4096c7d05/68747470733a2f2f7777772e70617970616c6f626a656374732e636f6d2f656e5f55532f692f62746e2f62746e5f646f6e6174655f534d2e676966" alt="donate" data-animated-image="" data-canonical-src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_SM.gif" style="max-width: 100%;"></a></p>
<div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Browser Usage</h1><a id="user-content-browser-usage" class="anchor" aria-label="Permalink: Browser Usage" href="#browser-usage"><svg data-component="Octicon" class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div>
<p dir="auto">To use <code>csvtojson</code> in browser is quite simple. There are two ways:</p>
<p dir="auto"><strong>1. Embed script directly into script tag</strong></p>
<p dir="auto">There is a pre-built script located in <code>browser/csvtojson.min.js</code>. Simply include that file in a <code>script</code> tag in <code>index.html</code> page:</p>
<div class="highlight highlight-text-html-basic notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="&lt;script src=&quot;node_modules/csvtojson/browser/csvtojson.min.js&quot;&gt;&lt;/script&gt;
&lt;!-- or use cdn --&gt;
&lt;script src=&quot;https://cdn.rawgit.com/Keyang/node-csvtojson/d41f44aa/browser/csvtojson.min.js&quot;&gt;&lt;/script&gt;"><pre><span class="pl-kos">&lt;</span><span class="pl-ent">script</span> <span class="pl-c1">src</span>="<span class="pl-s">node_modules/csvtojson/browser/csvtojson.min.js</span>"<span class="pl-kos">&gt;</span><span class="pl-kos">&lt;/</span><span class="pl-ent">script</span><span class="pl-kos">&gt;</span>
<span class="pl-c">&lt;!-- or use cdn --&gt;</span>
<span class="pl-kos">&lt;</span><span class="pl-ent">script</span> <span class="pl-c1">src</span>="<span class="pl-s">https://cdn.rawgit.com/Keyang/node-csvtojson/d41f44aa/browser/csvtojson.min.js</span>"<span class="pl-kos">&gt;</span><span class="pl-kos">&lt;/</span><span class="pl-ent">script</span><span class="pl-kos">&gt;</span></pre></div>
<p dir="auto">then use a global <code>csv</code> function</p>
<div class="highlight highlight-text-html-basic notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="&lt;script&gt;
csv({
	output: &quot;csv&quot;
})
.fromString(&quot;a,b,c\n1,2,3&quot;)
.then(function(result){

})
&lt;/script&gt;"><pre><span class="pl-kos">&lt;</span><span class="pl-ent">script</span><span class="pl-kos">&gt;</span>
<span class="pl-en">csv</span><span class="pl-kos">(</span><span class="pl-kos">{</span>
	<span class="pl-c1">output</span>: <span class="pl-s">"csv"</span>
<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">fromString</span><span class="pl-kos">(</span><span class="pl-s">"a,b,c\n1,2,3"</span><span class="pl-kos">)</span>
<span class="pl-kos">.</span><span class="pl-en">then</span><span class="pl-kos">(</span><span class="pl-k">function</span><span class="pl-kos">(</span><span class="pl-s1">result</span><span class="pl-kos">)</span><span class="pl-kos">{</span>

<span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-kos">&lt;/</span><span class="pl-ent">script</span><span class="pl-kos">&gt;</span></pre></div>
<p dir="auto"><strong>2. Use webpack or browserify</strong></p>
<p dir="auto">If a module packager is preferred, just simply <code>require("csvtojson")</code>:</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="var csv=require(&quot;csvtojson&quot;);

// or with import
import {csv} from &quot;csvtojson&quot;;

//then use csv as normal, you'll need to load the CSV first, this example is using Fetch https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch 
fetch('http://mywebsite.com/mycsvfile.csv')
  .then(response =&gt; response.text())
  .then(text =&gt; csv.fromString(text));
  .then(function(result){
  
  })
"><pre><span class="pl-k">var</span> <span class="pl-s1">csv</span><span class="pl-c1">=</span><span class="pl-en">require</span><span class="pl-kos">(</span><span class="pl-s">"csvtojson"</span><span class="pl-kos">)</span><span class="pl-kos">;</span>

<span class="pl-c">// or with import</span>
<span class="pl-k">import</span> <span class="pl-kos">{</span><span class="pl-s1">csv</span><span class="pl-kos">}</span> <span class="pl-k">from</span> <span class="pl-s">"csvtojson"</span><span class="pl-kos">;</span>

<span class="pl-c">//then use csv as normal, you'll need to load the CSV first, this example is using Fetch https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch </span>
<span class="pl-en">fetch</span><span class="pl-kos">(</span><span class="pl-s">'http://mywebsite.com/mycsvfile.csv'</span><span class="pl-kos">)</span>
  <span class="pl-kos">.</span><span class="pl-en">then</span><span class="pl-kos">(</span><span class="pl-s1">response</span> <span class="pl-c1">=&gt;</span> <span class="pl-s1">response</span><span class="pl-kos">.</span><span class="pl-en">text</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">)</span>
  <span class="pl-kos">.</span><span class="pl-en">then</span><span class="pl-kos">(</span><span class="pl-s1">text</span> <span class="pl-c1">=&gt;</span> <span class="pl-s1">csv</span><span class="pl-kos">.</span><span class="pl-en">fromString</span><span class="pl-kos">(</span><span class="pl-s1">text</span><span class="pl-kos">)</span><span class="pl-kos">)</span><span class="pl-kos">;</span>
  <span class="pl-kos">.</span><span class="pl-en">then</span><span class="pl-kos">(</span><span class="pl-k">function</span><span class="pl-kos">(</span><span class="pl-s1">result</span><span class="pl-kos">)</span><span class="pl-kos">{</span>
  
  <span class="pl-kos">}</span><span class="pl-kos">)</span></pre></div>
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      <div class="octocat-spinner tmp-my-6 js-details-dialog-spinner"></div>
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    <div class="Popover js-hovercard-content position-absolute" style="display: none; outline: none;">
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    <template id="snippet-clipboard-copy-button">
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</template>
<template id="snippet-clipboard-copy-button-unpositioned">
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</svg>
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</svg>
    </clipboard-copy>
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