The rejectionhandled
event is sent to the script's global scope (usually window
but also Worker
) whenever a JavaScript Promise
is rejected but after the promise rejection has been handled. This can be used in debugging and for general application resiliency, in tandem with the unhandledrejection
event, which is sent when a promise is rejected but there is no hander for the rejection.
Bubbles | No |
---|---|
Cancelable | No |
Interface | PromiseRejectionEvent |
Event handler property | onrejectionhandled |
Example
You can use the rejectionhandled
event to log promises that get rejected to the console, along with the reasons why they were rejected:
window.addEventListener("rejectionhandled", event => { console.log("Promise rejected; reason: " + event.reason); }, false);
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of 'rejectionhandled' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
rejectionhandled event | Chrome Full support 49 | Edge Full support ≤79 | Firefox
Full support
69
| IE No support No | Opera Full support 36 | Safari Full support 11 | WebView Android Full support 49 | Chrome Android Full support 49 | Firefox Android
Full support
68
| Opera Android Full support 36 | Safari iOS Full support 11.3 | Samsung Internet Android Full support 5.0 |
Legend
- Full support
- Full support
- No support
- No support
- User must explicitly enable this feature.
- User must explicitly enable this feature.