Window: messageerror event

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2023.

The messageerror event is fired on a Window object when it receives a message that can't be deserialized.

This event is not cancellable and does not bubble.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("messageerror", (event) => { })

onmessageerror = (event) => { }

Listen for messageerror using addEventListener():

window.addEventListener("messageerror", (event) => {
  console.error(event);
});

The same, but using the onmessageerror event handler property:

window.onmessageerror = (event) => {
  console.error(event);
};

Specification
HTML # event-messageerror
HTML # handler-window-onmessageerror

This page was last modified on Jul 28, 2026 by MDN contributors.