DedicatedWorkerGlobalScope: message event
The message
event is fired on a DedicatedWorkerGlobalScope
object when the worker receives a message from its parent (i.e. when the parent sends a message using Worker.postMessage()
).
Bubbles | No |
---|---|
Cancelable | No |
Interface | MessageEvent |
Event handler property | onmessage |
Examples
This code creates a new worker and sends it a message using Worker.postMessage()
:
const worker = new Worker("static/scripts/worker.js");
worker.addEventListener('message', (event) => {
console.log(`Received message from worker: ${event.data}`)
});
The worker can listen for this message using addEventListener()
:
// inside static/scripts/worker.js
self.addEventListener('message', (event) => {
console.log(`Received message from parent: ${event.data}`);
});
Alternatively, it could listen using the onmessage
event handler property:
// static/scripts/worker.js
self.onmessage = (event) => {
console.log(`Received message from parent: ${event.data}`);
};
Specifications
Specification | Status |
---|---|
HTML Living Standard | Living Standard |
Browser compatibility
BCD tables only load in the browser
See also
- Related events:
messageerror
. Worker.postMessage()
.