Promises
- OTHERA promise represents the eventual result of an asynchronous operation.
Chrome
- 4 - 31: Not supported (but has polyfill available)
- 32: Partial support
- 33 - 103: Supported
- 104: Supported
- 105 - 107: Supported
Edge
- 12 - 103: Supported
- 104: Supported
Safari
- 3.1 - 7: Not supported (but has polyfill available)
- 7.1 - 15.5: Supported
- 15.6: Supported
- 16.0 - TP: Supported
Firefox
- 2 - 26: Not supported (but has polyfill available)
- 27 - 28: Partial support
- 29 - 102: Supported
- 103: Supported
- 104 - 105: Supported
Opera
- 9 - 18: Not supported (but has polyfill available)
- 19: Partial support
- 20 - 88: Supported
- 89: Supported
- 90: Supported
IE
- 5.5 - 10: Not supported (but has polyfill available)
- 11: Not supported (but has polyfill available)
Chrome for Android
- 104: Supported
Safari on iOS
- 3.2 - 7.1: Not supported (but has polyfill available)
- 8 - 15.4: Supported
- 15.5: Supported
- 16.0: Supported
Samsung Internet
- 4 - 17.0: Supported
- 18.0: Supported
Opera Mini
- all: Not supported (but has polyfill available)
Opera Mobile
- 10 - 12.1: Not supported (but has polyfill available)
- 64: Supported
UC Browser for Android
- 12.12: Supported
Android Browser
- 2.1 - 4.4: Not supported (but has polyfill available)
- 4.4.3: Supported
- 104: Supported
Firefox for Android
- 101: Supported
QQ Browser
- 10.4: Supported
Baidu Browser
- 7.12: Supported
KaiOS Browser
- 2.5: Supported