The onunhandledrejection
property of the WindowEventHandlers
mixin is the EventHandler
for processing unhandledrejection
events. These events are raised for unhandled Promise
rejections.
Syntax
window.onunhandledrejection = function;
Value
function
is an EventHandler
or function to call when unhandledrejection
events are received by the window. The event handler receives as an input parameter as a PromiseRejectionEvent
.
Examples
This example simply logs unhandled rejections' reason
values to the console.
window.onunhandledrejection = function(e) { console.log(e.reason); }
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of 'onunhandledrejection' 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
onunhandledrejection | 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 No support No | Safari iOS Full support 11.3 | Samsung Internet Android Full support 5.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.