Explore Modern Web APIs

Demos and samples for learning and experimenting with JavaScript Web APIs. Discover what your browser can do!

Featured API Demo

Detect and monitor user text selections in real-time. Great for text editors, custom context menus, and interactive highlighting.

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Click Run to see output...

Work with audio, video, and media capture capabilities

Store and retrieve data locally in the browser

Make requests, handle responses, and manage connectivity

Access device hardware features like battery, vibration, and sensors

Measure and optimize application performance

Implement secure authentication and data protection