Web/API/Worker/messageerror event

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

Bubbles	No
Cancelable	No
Interface	MessageEvent
Event handler property	onmessageerror

Examples

Create a worker, and listen for message and messageerror events using addEventListener():

// inside main.js

const worker = new Worker("static/scripts/worker.js");

worker.addEventListener("message", (event) => {
    console.error(`Received message from worker: ${event}`);
});

worker.addEventListener("messageerror", (event) => {
    console.error(`Error receiving message from worker: ${event}`);
});

The same, but using the onmessageerror event handler property:

// inside main.js

const worker = new Worker("static/scripts/worker.js");

worker.onmessage = (event) => {
    console.error(`Received message from worker: ${event}`);
};

worker.onmessageerror = (event) => {
    console.error(`Error receiving message from worker: ${event}`);
};

Specifications

Specification	Status
HTML Living Standard	Living Standard

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
messageerror event	Chrome Full support 60	Edge Full support 18	Firefox Full support 57	IE ?	Opera Full support 47	Safari ?	WebView Android Full support 60	Chrome Android Full support 60	Firefox Android Full support 57	Opera Android Full support 47	Safari iOS ?	Samsung Internet Android Full support 8.0

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

See also

• Worker.postMessage()
• Related events: message.

Worker: messageerror event by Mozilla Contributors is licensed under CC-BY-SA 2.5.