Window: rejectionhandled event - Web APIs 编辑

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.

BubblesNo
CancelableNo
InterfacePromiseRejectionEvent
Event handler propertyonrejectionhandled

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

SpecificationStatusComment
HTML Living Standard
The definition of 'rejectionhandled' in that specification.
Living StandardInitial definition.

Browser compatibility

BCD tables only load in the browser

See also

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