The WebSocket.onopen property is an event handler that is called when the WebSocket connection's readyState changes to 1; this indicates that the connection is ready to send and receive data. It is called with an Event.
aWebSocket.onopen = function(event) { console.log("WebSocket is open now."); };
An EventListener.
| Specification |
|---|
| HTML Standard (HTML) # handler-websocket-onopen |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
onopen |
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/onopen