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The PromiseRejectionEvent interface represents events which are fired when JavaScript Promises are rejected. These events are particularly useful for telemetry and debugging purposes.
Constructor
PromiseRejectionEvent()- Creates a
PromiseRejectionEventevent with the given parameters.
Properties
Also inherits properties from its parent Event.
PromiseRejectionEvent.promiseRead only- The JavaScript
Promisewhich resulted in rejection. PromiseRejectionEvent.reasonRead only- A value or
Objectindicating why the promise was rejected, as passed toPromise.reject().
Methods
No specific methods; inherits methods from its parent Event.
Events
unhandledrejection- Fired when a JavaScript
Promiseis rejected but there is no rejection handler to deal with the rejection. rejectionhandled- Fired when a JavaScript
Promiseis rejected, and after the rejection is handled by the promise's rejection handling code.
Specifications
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of 'PromiseRejectionEvent' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 49 | No support | No support | No support | No support |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | No support | No support | No support | No support | No support |