Extension.js Docs

The documentation website for Extension.js

Extension.js Docs is the documentation site for the cross-browser extension framework. It publishes the guides, references, workflows, and implementation notes for Extension.js.

• Read the docs: extension.js.org
• View the available examples: extension-js/examples
• Explore the framework: extension-js/extension.js
• Contribute to the framework: CONTRIBUTING.md

Frameworks

Every framework below gets automatic detection, bundling, and dev-time updates, with no build config to write. What differs is the update model on edit: React hot-swaps with fast refresh and keeps component state, Vue and Svelte remount, and TypeScript, vanilla JS, and WebAssembly reload per surface.

ESNext Try out	TypeScript Try out	WASM Try out	React Try out	Vue Try out	Svelte Try out	Preact Try out

Browsers

Chrome, Edge, and Firefox are the primary targets, and any Chromium- or Gecko-based fork you have installed (Brave, Opera, Vivaldi, Yandex, Waterfox, LibreWolf) is auto-located and runs through the same HMR workflow. Safari builds on macOS through Apple's converter and needs the full Xcode app.

Google Chrome ✅ Supported	Microsoft Edge ✅ Supported	Mozilla Firefox ✅ Supported	Apple Safari ✅ Supported	Chromium-based ✅ Supported	Gecko-based ✅ Supported

Package managers

npm, pnpm, yarn, bun, and deno all work for create, dev, and build. The toolchain is manifest-agnostic, so Deno projects scaffold a deno.jsonc instead of a package.json and everything else behaves the same.

npm ✅ Supported	pnpm ✅ Supported	Yarn ✅ Supported	Bun ✅ Supported	Deno ✅ Supported

Run locally

Install dependencies:

pnpm install

Start the docs dev server:

pnpm dev

Build the site:

pnpm build

Preview the production build:

pnpm preview

License

MIT (c) Cezar Augusto and the Extension.js authors.