Content TypeScript

Shows a small overlay UI on every web page, with an options page that moves it from right to left.

Runs on Chrome, Edge, Firefox · Manifest V3 · Surfaces: content script, options page, background service worker · Styling: CSS · Level: beginner

Create this project

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

What it is for

  • A typed overlay injected into every page
  • One setting shared between an options page and a content script
  • Starting point for TypeScript extensions that need preferences

First steps

  • Run npm run dev to launch the extension
  • Click Open options on the overlay injected into the page
  • Tick the setting and watch the overlay move to the left edge

Permissions it asks for

  • storage
  • <all_urls>

Source on GitHubDocumentation

extension.devDocumentation for extension.dev