The messageerror event (used by multiple APIs: MessagePort, Web Workers, Broadcast Channel, Window) is fired when a object receives a message that cannot be deserialized and therefore raises an error.

Bubbles No
Cancelable No
Target objects MessagePort, DedicatedWorkerGlobalScope, Worker, BroadcastChannel, Window
Interface MessageEvent


Worker.onmessageerror = function() {
  // Respond to a message error


The messageerror event implements the MessageEvent interface, which inherits from Event. It therefore has available the properties and methods defined on both these interfaces.


Specification Status Comment
HTML Living Standard
The definition of 'messageerror' in that specification.
Living Standard  

Browser compatibility

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Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 60 ? 57 (57) ? 47 ?
Feature Android Webview Chrome for Android Edge Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 60 60 ? 57.0 (57) ? ? 47 ?

Document Tags and Contributors

Contributors to this page: chrisdavidmills
Last updated by: chrisdavidmills,