WindowEventHandlers.onunhandledrejection

The Window.onunhandledrejection property is an event handler for processing unhandledrejection events, which are raised for unhandled Promise rejections.

Syntax

window.addEventListener("unhandledrejection", function(event) { ... });
window.onunhandledrejection = function(event) { ...};

The event received by the event handler is a PromiseRejectionEvent.

Specifications

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

Browser compatibility