JavaScript

Adds a sidebar panel to the browser with a simple page.

Runs on Chrome, Edge, Firefox · Manifest V3 · Surfaces: sidebar, content script, popup, background service worker · Styling: CSS

Create this project

npx extension@latest create my-javascript --template javascript
cd my-javascript
npm install
npm run dev

Files in this template

extension.config.js
src/background.js
src/content/ContentApp.js
src/content/scripts.js
src/content/styles.css
src/images/icon.png
src/manifest.json
src/sidebar/SidebarApp.js
src/sidebar/index.html
src/sidebar/scripts.js
src/sidebar/styles.css

Source on GitHub Documentation

extension.dev Documentation for extension.dev