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The messageerror event fires on a target, such as a window or worker, when an incoming message cannot be deserialized. This event can fire for many types of messages, such as cross-document messages or broadcast channel messages.

Status

Baseline Newly Available (since 2023-03-27)

This feature is expected to reach Baseline Widely Available status on: 2025-09-27

MDN documentation

Window: messageerror event
Worker: messageerror event

Specifications

HTML (#event-messageerror), from HTML Workstream (WHATWG).
Service Workers (#eventdef-serviceworkerglobalscope-messageerror), from Web Applications Working Group (W3C).

Browser support

Chrome 60 Released on 2017-07-25
Chrome Android 60 Released on 2017-08-01
Edge 18 Released on 2018-10-02
Firefox 57 Released on 2017-11-14
Firefox for Android 57 Released on 2017-11-28
Safari 16.4 Released on 2023-03-27
Safari on iOS 16.4 Released on 2023-03-27

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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