WebSocket: message event
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The message event is fired when data is received through a WebSocket.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
js
addEventListener("message", (event) => { })
onmessage = (event) => { }
Event type
A MessageEvent. Inherits from Event.
Examples
js
// Create WebSocket connection.
const socket = new WebSocket("ws://localhost:8080");
// Listen for messages
socket.addEventListener("message", (event) => {
console.log("Message from server ", event.data);
});
Specifications
| Specification |
|---|
| WebSockets # dom-websocket-onmessage |