XHTML+SMIL animation
- UNOFFMethod of using SMIL animation in web pages
Chrome
- 4 - 123: Not supported (but has polyfill available)
- 124: Not supported (but has polyfill available)
- 125 - 127: Not supported (but has polyfill available)
Edge
- 12 - 18: Not supported
- 79 - 122: Not supported (but has polyfill available)
- 123: Not supported (but has polyfill available)
Safari
- 3.1 - 17.3: Not supported (but has polyfill available)
- 17.4: Not supported (but has polyfill available)
- 17.5 - TP: Not supported (but has polyfill available)
Firefox
- 2 - 124: Not supported (but has polyfill available)
- 125: Not supported (but has polyfill available)
- 126 - 128: Not supported (but has polyfill available)
Opera
- 9 - 108: Not supported (but has polyfill available)
- 109: Not supported (but has polyfill available)
IE
- 5.5: Not supported
- 6 - 8: Partial support
- 9 - 10: Not supported
- 11: Not supported
Chrome for Android
- 123: Not supported (but has polyfill available)
Safari on iOS
- 3.2 - 17.3: Not supported (but has polyfill available)
- 17.4: Not supported (but has polyfill available)
- 17.5: Not supported (but has polyfill available)
Samsung Internet
- 4 - 23: Not supported (but has polyfill available)
- 24: Not supported (but has polyfill available)
Opera Mini
- all: Not supported (but has polyfill available)
Opera Mobile
- 10 - 12.1: Not supported (but has polyfill available)
- 80: Not supported (but has polyfill available)
UC Browser for Android
- 15.5: Not supported (but has polyfill available)
Android Browser
- 2.1 - 4.4.4: Not supported (but has polyfill available)
- 123: Not supported (but has polyfill available)
Firefox for Android
- 124: Not supported (but has polyfill available)
QQ Browser
- 14.9: Not supported (but has polyfill available)
Baidu Browser
- 13.52: Not supported (but has polyfill available)
KaiOS Browser
- 2.5: Not supported (but has polyfill available)
- 3: Not supported (but has polyfill available)
Internet Explorer supports the W3C proposal HTML+TIME, which is largely the same as XHTML+SMIL