> For the complete documentation index, see [llms.txt](https://docs.chathq.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chathq.io/api-and-developer-docs/overview.md).

# Overview

<table data-card-size="large" data-view="cards" data-full-width="false"><thead><tr><th></th><th></th><th></th><th data-type="content-ref"></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="files"></th></tr></thead><tbody><tr><td><a href="/api-and-developer-docs/javascript-api.md"><mark style="color:purple;"><strong>JavaScript API</strong></mark></a></td><td>The Engagement Widget JavaScript API allows JavaScript code running on your site or app to interact with the Engagement Widget.</td><td></td><td></td><td></td><td></td></tr><tr><td><strong>Custom Tracking &#x26; Analytics</strong></td><td>Connecting widget analytics to 3rd party data tracking software like Google Analytics and Facebook Ad Events.</td><td><ul><li><a href="/api-and-developer-docs/custom-tracking-and-analytics/widget-events-in-google-analytics.md">Widget Events in Google Analytics</a></li><li><a href="/api-and-developer-docs/custom-tracking-and-analytics/tracking-events-from-facebook-ads.md">Tracking Events from Facebook Ads</a></li></ul></td><td></td><td></td><td></td></tr></tbody></table>