The message
event is used in a page controlled by a service worker to receive messages from the service worker.
Bubbles | No |
---|---|
Cancelable | No |
Interface | MessageEvent |
Event handler property | onmessage |
Examples
In this example the service worker get the client's ID from a fetch
event and then sends it a message using Client.postMessage
:
// in the service worker async function messageClient(clientId) { const client = await clients.get(clientId); client.postMessage('Hi client!'); } addEventListener('fetch', (event) => { messageClient(event.clientId); event.respondWith(() => { // ... }); });
The client can receive the message by listening to the message
event:
// in the page being controlled navigator.serviceWorker.addEventListener('message', (message) => { console.log(message); });
Specifications
Specification | Status |
---|---|
Service Workers The definition of 'message' in that specification. |
Working Draft |
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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
message event | Chrome Full support 40 | Edge
Full support
17
| Firefox
Full support
44
| IE No support No | Opera Full support 27 | Safari Full support 11.1 | WebView Android Full support 40 | Chrome Android Full support 40 | Firefox Android Full support 44 | Opera Android Full support 27 | Safari iOS Full support 11.3 | Samsung Internet Android Full support 4.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.