The Window.onunhandledrejection property is an event handler for processing unhandledrejection events, which are raised for unhandled Promise rejections.
SyntaxEdit
window.addEventListener("unhandledrejection", function(event) { ... });
window.onunhandledrejection = function(event) { ...};
The event received by the event handler is a PromiseRejectionEvent.
SpecificationsEdit
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of 'onunhandledrejection' in that specification. |
Living Standard | Initial definition. |