WebSocket: message event

The message event is fired when data is received through a WebSocket.

Bubbles No
Cancelable No
Interface MessageEvent
Event handler property onmessage


// 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 Status
HTML Living Standard
The definition of 'WebSocket message' in that specification.
Living Standard

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
message eventChrome Full support YesEdge Full support 12Firefox Full support YesIE ? Opera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android ? Safari iOS ? Samsung Internet Android Full support Yes


Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also