WindowEventHandlers.onrejectionhandled

The Window.onrejectionhandled property is an event handler for processing rejectionhandled events, which are raised when Promises are rejected.

Syntax

window.addEventListener("rejectionhandled", function(event) { ... });
window.onrejectionhandled = function(event) { ...};

Examples

window.onrejectionhandled = function(e) {
  console.log(e.reason);
}

Specifications

Specification Status Comment
HTML Living Standard
The definition of 'onrejectionhandled' in that specification.
Living Standard Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support49 ? No1 No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No ? No1 No No ?

1. Firefox implements the PromiseRejectionEvent interface if you go to about:config and set the dom.promise_rejection_events.enabled pref to true. However, Firefox doesn't yet actually send the unhandledrejection or understand rejectionhandled events. Completing the implementation will be addressed in bug 1362272.

Document Tags and Contributors

Contributors to this page: fscholz, Sheppy, chrisdavidmills, rolfedh, jpmedley
Last updated by: fscholz,