Promises

- OTHER

A promise represents the eventual result of an asynchronous operation.

Chrome

  1. 4 - 31: Not supported (but has polyfill available)
  2. 32: Partial support
  3. 33 - 103: Supported
  4. 104: Supported
  5. 105 - 107: Supported

Edge

  1. 12 - 103: Supported
  2. 104: Supported

Safari

  1. 3.1 - 7: Not supported (but has polyfill available)
  2. 7.1 - 15.5: Supported
  3. 15.6: Supported
  4. 16.0 - TP: Supported

Firefox

  1. 2 - 26: Not supported (but has polyfill available)
  2. 27 - 28: Partial support
  3. 29 - 102: Supported
  4. 103: Supported
  5. 104 - 105: Supported

Opera

  1. 9 - 18: Not supported (but has polyfill available)
  2. 19: Partial support
  3. 20 - 88: Supported
  4. 89: Supported
  5. 90: Supported

IE

  1. 5.5 - 10: Not supported (but has polyfill available)
  2. 11: Not supported (but has polyfill available)

Chrome for Android

  1. 104: Supported

Safari on iOS

  1. 3.2 - 7.1: Not supported (but has polyfill available)
  2. 8 - 15.4: Supported
  3. 15.5: Supported
  4. 16.0: Supported

Samsung Internet

  1. 4 - 17.0: Supported
  2. 18.0: Supported

Opera Mini

  1. all: Not supported (but has polyfill available)

Opera Mobile

  1. 10 - 12.1: Not supported (but has polyfill available)
  2. 64: Supported

UC Browser for Android

  1. 12.12: Supported

Android Browser

  1. 2.1 - 4.4: Not supported (but has polyfill available)
  2. 4.4.3: Supported
  3. 104: Supported

Firefox for Android

  1. 101: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Supported
Resources:
Promises/A+ spec
Chromium dashboard - ES6 Promises
A polyfill for ES6-style Promises
Polyfill for this feature is available in the core-js library
JavaScript Promises: There and back again - HTML5 Rocks