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 StandardThe 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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
onunhandledrejection
|
Chrome
Full support 49 |
Edge
Full support ≤79 |
Firefox Full support 69 Full support 69 Full support 68 Disabled' From version 68: this feature is behind the Notes' This event handler was added in Firefox 55 but was disabled since it wasn't fully implemented. It was fully implemented in Firefox 68 and enabled by default in Firefox 69.
Disabled' From version 55: this feature is behind the |
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 Full support 68 Disabled' From version 68: this feature is behind the Notes' This event handler was added in Firefox 55 but was disabled since it wasn't fully implemented. It was fully implemented in Firefox 68 but not enabled by default.
Disabled' From version 55: this feature is behind the |
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.
WindowEventHandlers.onunhandledrejection by Mozilla Contributors is licensed under CC-BY-SA 2.5.