unhandledrejection/rejectionhandled events

- LS

The unhandledrejection event is fired when a Promise is rejected but there is no rejection handler to deal with the rejection. The rejectionhandled event is fired when a Promise is rejected, and after the rejection is handled by the promise's rejection handling code.

Chrome

  1. 4 - 48: Not supported
  2. 49 - 124: Supported
  3. 125: Supported
  4. 126 - 128: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 124: Supported
  3. 125: Supported

Safari

  1. 3.1 - 10.1: Not supported
  2. 11 - 17.4: Supported
  3. 17.5: Supported
  4. 17.6 - TP: Supported

Firefox

  1. 2 - 68: Not supported
  2. 69 - 125: Supported
  3. 126: Supported
  4. 127 - 129: Supported

Opera

  1. 9 - 35: Not supported
  2. 36 - 108: Supported
  3. 109: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 125: Supported

Safari on iOS

  1. 3.2 - 10.3: Not supported
  2. 11: Support unknown
  3. 11.3 - 17.4: Supported
  4. 17.5: Supported
  5. 17.6: Supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 23: Supported
  3. 24: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 80: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 125: Supported

Firefox for Android

  1. 126: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Supported
Resources:
MDN article on rejectionhandled
MDN article on unhandledrejection
Polyfill for this feature is available in the core-js library
Chrome sample code