A Vite plugin that displays baseline compatibility warnings directly in your browser during development.

• Real-time API detection - Scans JavaScript and CSS files for potentially non-baseline APIs
• Browser compatibility information - Shows which browsers support each API
• Spec documentation links - Direct links to web standards documentation
• Live reload integration - Updates warnings as you code

npm install vite-plugin-baseline-overlay

// vite.config.ts
import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'
import baselineOverlay from 'vite-plugin-baseline-overlay'

export default defineConfig({
  plugins: [react(), baselineOverlay()],
})

The plugin works by:

1. Scanning your source files for JavaScript and CSS APIs during development
2. Checking compatibility against the web-features database to determine if APIs are baseline
3. Displaying warnings in an overlay when non-baseline APIs are detected
4. Providing detailed information including browser support and spec documentation

# Install dependencies
npm install

# Build the plugin
npm run build

# Watch for changes during development
npm run dev

Contributions are welcome! Please feel free to submit a Pull Request.

MIT

• Initial release
• Browser compatibility warnings
• WebSocket communication
• Support for JavaScript and CSS scanning