---
description: Write Cloudflare Workers using JavaScript standards and web platform APIs.
title: JavaScript
image: https://developers.cloudflare.com/og-docs.png
---

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> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/workers/llms.txt  
> Use this file to discover all available pages before exploring further.

# JavaScript

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/workers/languages/javascript/index.md)|[Agent setup](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/agent-setup/)

The Workers platform is designed to be [JavaScript standards compliant ↗](https://ecma-international.org/publications-and-standards/standards/ecma-262/) and web-interoperable, and supports JavaScript standards, as defined by [TC39 ↗](https://tc39.es/) (ECMAScript). Wherever possible, it uses web platform APIs, so that code can be reused across client and server, as well as across [WinterCG ↗](https://wintercg.org/) JavaScript runtimes.

Refer to [Runtime APIs](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/workers/runtime-apis/) for more information on specific JavaScript APIs available in Workers.

### Resources

* [Getting Started](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/workers/get-started/guide/)
* [Quickstarts](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/workers/get-started/quickstarts/) – More example repos to use as a basis for your projects
* [TypeScript type definitions ↗](https://github.com/cloudflare/workers-types)
* [JavaScript and web standard APIs](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/workers/runtime-apis/web-standards/)
* [Tutorials](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/workers/tutorials/)
* [Examples](https://fix-ai-gateway-guardrails-streaming-docs.previews.developers.cloudflare.com/workers/examples/?languages=JavaScript)

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```