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web api event

ServiceWorkerContainer: messageerror event

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Secure contextAvailable in workers

The messageerror event is fired to the ServiceWorkerContainer when an incoming message sent to the associated worker can’t be deserialized.

This event is not cancelable and does not bubble.

Syntax

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

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

onmessageerror = (event) => { }

Event type

A MessageEvent. Inherits from Event.

Examples

In this example the service worker get the client’s ID from a fetch event and then sends it a message using postMessage:

// service-worker.js
async function messageClient(clientId) {
  const client = await self.clients.get(clientId);
  client.postMessage("Hi client!");
}

self.addEventListener("fetch", (event) => {
  messageClient(event.clientId);
  event.respondWith(() => {
    // …
  });
});

The service worker can listen for the message deserialization error by listening to the messageerror event:

// main.js
navigator.serviceWorker.addEventListener("messageerror", (event) => {
  console.error("Receive message from service worker failed!");
});

Alternatively, the script can listen for the message deserialization error using onmessageerror:

// main.js
navigator.serviceWorker.onmessageerror = (event) => {
  console.error("Receive message from service worker failed!");
};

Specifications

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.

See also