Can I use
?

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 - 135: Supported
  4. ✅ 136: Supported
  5. ✅ 137 - 139: Supported

Edge

  1. ✅ 12 - 135: Supported
  2. ✅ 136: Supported

Safari

  1. ❌ 3.1 - 7: Not supported (but has polyfill available)
  2. ✅ 7.1 - 18.4: Supported
  3. ✅ 18.5: Supported
  4. ✅ TP: Supported

Firefox

  1. ❌ 2 - 26: Not supported (but has polyfill available)
  2. ◐ 27 - 28: Partial support
  3. ✅ 29 - 137: Supported
  4. ✅ 138: Supported
  5. ✅ 139 - 141: Supported

Opera

  1. ❌ 9 - 18: Not supported (but has polyfill available)
  2. ◐ 19: Partial support
  3. ✅ 20 - 116: Supported
  4. ✅ 117: Supported

IE

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

Chrome for Android

  1. ✅ 136: Supported

Safari on iOS

  1. ❌ 3.2 - 7.1: Not supported (but has polyfill available)
  2. ✅ 8 - 18.4: Supported
  3. ✅ 18.5: Supported

Samsung Internet

  1. ✅ 4 - 26: Supported
  2. ✅ 27: Supported

Opera Mini

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

Opera Mobile

  1. ❌ 10 - 12.1: Not supported (but has polyfill available)
  2. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ❌ 2.1 - 4.4: Not supported (but has polyfill available)
  2. ✅ 4.4.3: Supported
  3. ✅ 136: Supported

Firefox for Android

  1. ✅ 137: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported
Resources:
A polyfill for ES6-style Promises
Polyfill for this feature is available in the core-js library
Promises/A+ spec
JavaScript Promises: There and back again - HTML5 Rocks