Browser Support

This lesson explains Browser Support with clear examples, use cases, and best practices so you can use HTML5 APIs confidently in real web applications.

HTML5 Browser Support Overview

HTML5 is supported by all modern desktop and mobile browsers. However, some advanced HTML5 APIs such as File System Access, WebGPU, Battery Status, and Web Bluetooth have limited support or require secure HTTPS contexts. Before using advanced browser features, developers should always perform feature detection and provide fallback behavior.

Core HTML5 features like semantic elements, forms, audio, video, Canvas, SVG, Local Storage, and the Fetch API are widely supported across current browser versions.

HTML5 Feature Browser Support

HTML5 Feature / API	Chrome	Edge	Firefox	Safari	Mobile Browsers	Support
Semantic Elements	✔	✔	✔	✔	✔	Excellent
HTML5 Forms	✔	✔	✔	✔	✔	Excellent
Canvas API	✔	✔	✔	✔	✔	Excellent
SVG	✔	✔	✔	✔	✔	Excellent
Audio & Video	✔	✔	✔	✔	✔	Excellent
Local Storage	✔	✔	✔	✔	✔	Excellent
Session Storage	✔	✔	✔	✔	✔	Excellent
IndexedDB	✔	✔	✔	✔	✔	Excellent
Fetch API	✔	✔	✔	✔	✔	Excellent
WebSocket	✔	✔	✔	✔	✔	Excellent
Service Workers	✔	✔	✔	✔	✔	Excellent
Web Workers	✔	✔	✔	✔	✔	Excellent
Geolocation API	✔	✔	✔	✔	✔	Excellent
Clipboard API	✔*	✔*	✔*	✔*	✔*	HTTPS Required
Notification API	✔*	✔*	✔*	✔*	✔*	Permission Required
MediaDevices API	✔*	✔*	✔*	✔*	✔*	HTTPS + Permission
MediaRecorder API	✔	✔	✔	Partial	Partial	Good
WebRTC	✔	✔	✔	✔	✔	Excellent
Broadcast Channel API	✔	✔	✔	✔	✔	Good
Intersection Observer	✔	✔	✔	✔	✔	Excellent
Resize Observer	✔	✔	✔	✔	✔	Excellent
Mutation Observer	✔	✔	✔	✔	✔	Excellent
File API	✔	✔	✔	✔	✔	Excellent
Blob API	✔	✔	✔	✔	✔	Excellent
Drag and Drop API	✔	✔	✔	Partial	Partial	Good
File System Access API	✔	✔	Limited	Limited	Limited	Chromium Browsers
WebGPU	✔	✔	Partial	Partial	Partial	Growing Support
Battery Status API	Limited	Limited	✖	✖	Limited	Limited
Web Bluetooth API	✔	✔	✖	✖	Limited	Chromium Browsers

Feature Detection Example

// Always detect browser support

if ("serviceWorker" in navigator) {
  navigator.serviceWorker.register("/sw.js");
}

if ("clipboard" in navigator) {
  navigator.clipboard.writeText("Hello");
}

if ("geolocation" in navigator) {
  navigator.geolocation.getCurrentPosition(() => {
    console.log("Location available");
  });
}

Instead of checking browser names, use feature detection to determine whether an API is available. This approach is more reliable and future-proof.

Browser Compatibility Best Practices

Use feature detection instead of browser detection.
Always provide graceful fallback behavior.
Use HTTPS for secure browser APIs.
Test applications in Chrome, Edge, Firefox, Safari, and mobile browsers.
Request permissions only when users initiate an action.
Avoid relying on experimental browser APIs for critical features.
Keep browsers updated during development and testing.
Follow progressive enhancement principles.

Pro Tip

Browser support changes over time. Instead of hardcoding browser-specific logic, rely on feature detection, progressive enhancement, and graceful degradation. This ensures your application continues to work as browsers evolve.