The message
event is fired when data is received through a WebSocket
.
The message
event is fired when data is received through a WebSocket
.
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener('message', event => { }) onmessage = event => { }
An MessageEvent
. Inherits from Event
.
In addition to the properties listed below, properties from the parent interface, Event
, are available.
data
Read only
The data sent by the message emitter.
origin
Read only
A USVString
representing the origin of the message emitter.
lastEventId
Read only
A DOMString
representing a unique ID for the event.
source
Read only
A MessageEventSource
(which can be a Window
, MessagePort
, or ServiceWorker
object) representing the message emitter.
ports
Read only
An array of MessagePort
objects representing the ports associated with the channel the message is being sent through (where appropriate, e.g. in channel messaging or when sending a message to a shared worker).
// Create WebSocket connection. const socket = new WebSocket('ws://localhost:8080'); // Listen for messages socket.addEventListener('message', function (event) { console.log('Message from server ', event.data); });
Specification |
---|
WebSockets Standard # dom-websocket-onmessage |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
message_event |
4 |
12 |
7 |
10 |
12.1 |
5 |
≤37 |
18 |
7 |
12.1 |
4.2 |
1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/message_event