---
title: "JavaScript SDKs"
description: "Information specific to developing JavaScript based SDKs."
url: https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/
---

# JavaScript SDKs

This Section contains JavaScript SDK-specific information that's useful for developing new or extending existing JS SDKs as well as for ingest and product teams to understanding how the JS SDKs works and what data it sends.

If you're looking to contribute new features to the SDK or want to understand what data you can consume from the JS SDK, this is the right place to start. The JS SDK team encourages community or cross-team contributions to the SDK and is happy to help you get started.

Please reach out to the SDK team (on [GitHub](https://github.com/getsentry/sentry-javascript) or internally in Slack `#discuss-javascript`) if you have questions, concerns or plan on building a larger feature.

This document **does not** replace general SDK specifications like the Unified API or the SDK Development Guide. It also doesn't explain implementations in detail or link to SDK code. It's a supplement to other documents and contains information that's specific to the JavaScript SDKs.

* #### [Tracing in the Browser](https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/browser-tracing.md)

  Interesting aspects of tracing and performance instrumentation in the browser SDKs.

* #### [Bundle Size](https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/bundle-size.md)

  Why we think twice before adding a new line of code to the SDK

* #### [Debug IDs](https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/debug-ids.md)

  Requirements for the JS SDK to pick up Debug IDs

## Pages in this section

- [Tracing in the Browser](https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/browser-tracing.md)
- [Bundle Size](https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/bundle-size.md)
- [Debug IDs](https://develop.sentry.dev/sdk/platform-specifics/javascript-sdks/debug-ids.md)