The WebSocket.readyState read-only property returns the current state of the WebSocket connection.
Syntax
var readyState = aWebSocket.readyState;
Value
One of the following unsigned short values:
- 0 (
CONNECTING) - The connection is not yet open.
- 1 (
OPEN) - The connection is open and ready to communicate.
- 2 (
CLOSING) - The connection is in the process of closing.
- 3 (
CLOSED) - The connection is closed or couldn't be opened.
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'WebSocket: readyState' 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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Chrome Full support Yes | Edge ? | Firefox Full support Yes | IE ? | Opera Full support Yes | Safari ? | WebView Android ? | Chrome Android Full support Yes | Edge Mobile ? | Firefox Android Full support Yes | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown