The WebSocket.onopen property is an EventHandler 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.
Syntax
aWebSocket.onopen = function(event) {
console.log("WebSocket is open now.");
};
Value
An EventListener.
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'WebSocket: onopen' in that specification. |
Living Standard | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
onopen | Chrome Full support Yes | Edge Full support 12 | Firefox Full support Yes | IE ? | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown