JavaScript

Last updated Apr 23, 2026 The Workers platform is designed to be JavaScript standards compliant ↗︎ and web-interoperable, and supports JavaScript standards, as defined by TC39 ↗︎ (ECMAScript). Wherever possible, it uses web platform APIs, so that code can be reused across client and server, as well as across WinterCG ↗︎ JavaScript runtimes.

Refer to Runtime APIs for more information on specific JavaScript APIs available in Workers.

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description: Write Workers in 100% Python title: Python Workers image: https://developers.cloudflare.com/workers/languages/python/og.png?v=900a36ef7801c922

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