ECMAScript 5
- OTHERFull support for the ECMAScript 5 specification. Features include Function.prototype.bind, Array methods like indexOf, forEach, map & filter, Object methods like defineProperty, create & keys, the trim method on Strings and many more.
Chrome
- 4 - 18: Partial support
- 19 - 22: Partial support
- 23 - 123: Supported
- 124: Supported
- 125 - 127: Supported
Edge
- 12 - 122: Supported
- 123: Supported
Safari
- 3.1 - 5.1: Partial support
- 6 - 17.3: Supported
- 17.4: Supported
- 17.5 - TP: Supported
Firefox
- 2 - 3.6: Partial support
- 4 - 20: Partial support
- 21 - 124: Supported
- 125: Supported
- 126 - 128: Supported
Opera
- 9 - 12: Partial support
- 12.1: Partial support
- 15 - 108: Supported
- 109: Supported
IE
- 5.5 - 7: Not supported
- 8: Not supported
- 9: Partial support
- 10: Supported
- 11: Supported
Chrome for Android
- 123: Supported
Safari on iOS
- 3.2 - 5.1: Partial support
- 6 - 17.3: Supported
- 17.4: Supported
- 17.5: Supported
Samsung Internet
- 4 - 23: Supported
- 24: Supported
Opera Mini
- all: Partial support
Opera Mobile
- 10 - 12: Partial support
- 12.1: Partial support
- 80: Supported
UC Browser for Android
- 15.5: Supported
Android Browser
- 2.1 - 3: Partial support
- 4: Partial support
- 4.1 - 4.3: Partial support
- 4.4 - 4.4.4: Supported
- 123: Supported
Firefox for Android
- 124: Supported
QQ Browser
- 14.9: Supported
Baidu Browser
- 13.52: Supported
KaiOS Browser
- 2.5: Supported
- 3: Supported
As the specification includes many JavaScript features, un-numbered partial support varies widely and is shown in detail on the ECMAScript 5 compatibility tables by Kangax.
- Resources:
- Detailed compatibility tables & tests
- ES5 polyfill
- Polyfill for all possible ES5 features is available in the core-js library
- Overview of objects & properties
- Sub-features:
- ECMAScript 5 Strict Mode
- JSON parsing