Promises
- OTHERA promise represents the eventual result of an asynchronous operation.
Chrome
- 4 - 31: Not supported (but has polyfill available)
- 32: Partial support
- 33 - 112: Supported
- 113: Supported
- 114 - 116: Supported
Edge
- 12 - 112: Supported
- 113: Supported
Safari
- 3.1 - 7: Not supported (but has polyfill available)
- 7.1 - 16.4: Supported
- 16.5: Supported
- 16.6 - TP: Supported
Firefox
- 2 - 26: Not supported (but has polyfill available)
- 27 - 28: Partial support
- 29 - 112: Supported
- 113: Supported
- 114 - 115: Supported
Opera
- 9 - 18: Not supported (but has polyfill available)
- 19: Partial support
- 20 - 98: Supported
- 99: Supported
IE
- 5.5 - 10: Not supported (but has polyfill available)
- 11: Not supported (but has polyfill available)
Chrome for Android
- 113: Supported
Safari on iOS
- 3.2 - 7.1: Not supported (but has polyfill available)
- 8 - 16.4: Supported
- 16.5: Supported
Samsung Internet
- 4 - 20: Supported
- 21: Supported
Opera Mini
- all: Not supported (but has polyfill available)
Opera Mobile
- 10 - 12.1: Not supported (but has polyfill available)
- 73: Supported
UC Browser for Android
- 13.4: Supported
Android Browser
- 2.1 - 4.4: Not supported (but has polyfill available)
- 4.4.3: Supported
- 113: Supported
Firefox for Android
- 113: Supported
QQ Browser
- 13.1: Supported
Baidu Browser
- 13.18: Supported
KaiOS Browser
- 2.5: Supported
- 3: Supported