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

Browser compatibility