HTML Imports
- WDDeprecated method of including and reusing HTML documents in other HTML documents. Superseded by ES modules.
Chrome
- ❌ 4 - 29: Not supported
- ❌ 30 - 34: Disabled by default
- ❌ 35: Disabled by default
- ✅ 36 - 79: Supported
- ❌ 80 - 133: Not supported
- ❌ 134: Not supported
- ❌ 135 - 137: Not supported
Edge
- ❌ 12 - 18: Not supported (but has polyfill available)
- ✅ 79: Supported
- ❌ 80 - 133: Not supported
- ❌ 134: Not supported
Safari
- ❌ 3.1 - 5.1: Not supported
- ❌ 6 - 18.2: Not supported (but has polyfill available)
- ❌ 18.3: Not supported (but has polyfill available)
- ❌ 18.4 - TP: Not supported (but has polyfill available)
Firefox
- ❌ 2 - 29: Not supported
- ❌ 30 - 31: Not supported (but has polyfill available)
- ❌ 32 - 55: Disabled by default
- ❌ 56 - 135: Not supported (but has polyfill available)
- ❌ 136: Not supported (but has polyfill available)
- ❌ 137 - 139: Not supported (but has polyfill available)
Opera
- ❌ 9 - 16: Not supported
- ❌ 17 - 21: Disabled by default
- ❌ 22: Disabled by default
- ✅ 23 - 66: Supported
- ❌ 67 - 116: Not supported
- ❌ 117: Not supported
IE
- ❌ 5.5 - 9: Not supported
- ❌ 10: Not supported (but has polyfill available)
- ❌ 11: Not supported (but has polyfill available)
Chrome for Android
- ❌ 134: Not supported
Safari on iOS
- ❌ 3.2 - 6.1: Not supported
- ❌ 7 - 18.2: Not supported (but has polyfill available)
- ❌ 18.3: Not supported (but has polyfill available)
- ❌ 18.4: Not supported (but has polyfill available)
Samsung Internet
- ✅ 4 - 12.0: Supported
- ❌ 13.0 - 26: Not supported
- ❌ 27: Not supported
Opera Mini
- ❌ all: Not supported
Opera Mobile
- ❌ 10 - 12.1: Not supported
- ❌ 80: Not supported
UC Browser for Android
- ✅ 15.5: Supported
Android Browser
- ❌ 2.1 - 4.4.4: Not supported
- ❌ 134: Not supported
Firefox for Android
- ❌ 136: Not supported (but has polyfill available)
QQ Browser
- ✅ 14.9: Supported
Baidu Browser
- ❌ 13.52: Not supported
KaiOS Browser
- ✅ 2.5: Supported
- ❌ 3: Not supported (but has polyfill available)