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unhandledrejection/rejectionhandled events

95.55

JS JS API

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.

Further reading:

  1. Can I use page for: unhandledrejection/rejectionhandled events
  2. MDN article on rejectionhandled
  3. MDN article on unhandledrejection
  4. Chrome sample code
  5. Polyfill for this feature is available in the core-js library