ECMAScript 5

- OTHER

Full 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.

IE

  1. 5.5 - 7
  2. 8
  3. 9
  4. 10
  5. 11

Edge

  1. 12 - 81
  2. 83

Firefox

  1. 2 - 3.6
  2. 4 - 20
  3. 21 - 77
  4. 78
  5. 79 - 80

Chrome

  1. 4 - 18
  2. 19 - 22
  3. 23 - 81
  4. 83
  5. 84 - 86

Safari

  1. 3.1 - 5.1
  2. 6 - 13
  3. 13.1
  4. 14 - TP

Opera

  1. 9 - 12
  2. 12.1
  3. 15 - 68
  4. 69

iOS Safari

  1. 3.2 - 5.1
  2. 6 - 13.3
  3. 13.4
  4. 14.0

Opera Mini

  1. all

Android Browser

  1. 2.1 - 3
  2. 4
  3. 4.1 - 4.3
  4. 4.4 - 4.4.4
  5. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12
  2. 12.1
  3. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4 - 11.2
  2. 12.0

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

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:
ES5 polyfill
Polyfill for all possible ES5 features is available in the core-js library
Overview of objects & properties
Detailed compatibility tables & tests
Sub-features:
ECMAScript 5 Strict Mode
JSON parsing