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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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
rejectionhandled event | Chrome Full support 49 | Edge ? | Firefox
Full support
69
| IE No support No | Opera No support No | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android
Full support
68
| Opera Android No support No | Safari iOS No support No | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- User must explicitly enable this feature.
- User must explicitly enable this feature.