WindowEventHandlers.onunhandledrejection

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

Syntax

window.onunhandledrejection = EventHandler;

Value

An EventHandler or function to call when unhandledrejection events are received by the window. The event handler receives as an input parameter a PromiseRejectionEvent.

Examples

This example simply logs unhandled rejections' reason values to the console.

window.onunhandledrejection = function(e) {
  console.log(e.reason);
}

Specifications

Browser compatibilityUpdate compatibility data on GitHub