Custom Elements (V1)
- LSOne of the key features of the Web Components system, custom elements allow new HTML tags to be defined.
Chrome
- 4 - 51: Not supported
- 52 - 53: Not supported (but has polyfill available)
- 54 - 66: Partial support
- 67 - 123: Supported
- 124: Supported
- 125 - 127: Supported
Edge
- 12 - 18: Not supported (but has polyfill available)
- 79 - 122: Supported
- 123: Supported
Safari
- 3.1 - 7.1: Not supported
- 8 - 10: Not supported (but has polyfill available)
- 10.1 - 17.3: Partial support
- 17.4: Partial support
- 17.5 - TP: Partial support
Firefox
- 2 - 29: Not supported
- 30 - 49: Not supported (but has polyfill available)
- 50 - 58: Disabled by default
- 59 - 62: Disabled by default
- 63 - 124: Supported
- 125: Supported
- 126 - 128: Supported
Opera
- 9 - 40: Not supported
- 41 - 63: Partial support
- 64 - 108: Supported
- 109: Supported
IE
- 5.5 - 9: Not supported
- 10: Not supported (but has polyfill available)
- 11: Not supported (but has polyfill available)
Chrome for Android
- 123: Supported
Safari on iOS
- 3.2 - 10.2: Not supported
- 10.3 - 17.3: Partial support
- 17.4: Partial support
- 17.5: Partial support
Samsung Internet
- 4: Not supported
- 5: Partial support
- 6.2 - 23: Supported
- 24: Supported
Opera Mini
- all: Not supported
Opera Mobile
- 10 - 12.1: Not supported
- 80: Supported
UC Browser for Android
- 15.5: Supported
Android Browser
- 2.1 - 4.4.4: Not supported
- 123: Supported
Firefox for Android
- 124: Supported
QQ Browser
- 14.9: Supported
Baidu Browser
- 13.52: Supported
KaiOS Browser
- 2.5: Not supported (but has polyfill available)
- 3: Supported