The data
read-only property of the ExtendableMessageEvent
interface returns the event's data. It can be any data type.
Syntax
var myData = extendableMessageEvent.data;
Value
Any data type.
Examples
When the following code is used inside a service worker to respond to a push messages by sending the data received via PushMessageData
to the main context via a channel message, the event object of onmessage
will be a ExtendableMessageEvent
.
var port;
self.addEventListener('push', function(e) {
var obj = e.data.json();
if(obj.action === 'subscribe' || obj.action === 'unsubscribe') {
port.postMessage(obj);
} else if(obj.action === 'init' || obj.action === 'chatMsg') {
port.postMessage(obj);
}
});
self.onmessage = function(e) {
console.log(e.data);
port = e.ports[0];
}
Specifications
Specification | Status | Comment |
Service WorkersThe definition of 'ExtendableMessageEvent.data' in that specification. | Working Draft | Initial definition. |
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
Full support 51 |
Edge
Full support ≤79 |
Firefox Full support 45 Full support 45 Notes' Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API. |
IE
No support No |
Opera
? |
Safari
No support No |
WebView Android
No support No |
Chrome Android
Full support 51 |
Firefox Android
Full support 45 |
Opera Android
? |
Safari iOS
No support No |
Samsung Internet Android
Full support 5.0 |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.'
- Experimental. Expect behavior to change in the future.
- See implementation notes.'
- See implementation notes.
See also
ExtendableMessageEvent.data by Mozilla Contributors is licensed under CC-BY-SA 2.5.