The rejectionhandled event is fired when a JavaScript Promise is rejected, and after the rejection is handled by the promise's rejection handling code.

Bubbles No
Cancelable No
Target objects defaultView
Interface PromiseRejectionEvent


window.addEventListener("rejectionhandled", function (event) {
  console.log("Promise rejected! Reason: " + reason);


The rejectionhandled event implements the PromiseRejectionEvent interface, which inherits from Event. You can use the properties and methods defined on these interfaces.

See also

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 Contributors to this page: fscholz, Sheppy
 Last updated by: fscholz,