The WebSocket.readyState read-only property returns the current state of the WebSocket connection.
WebSocket: readyState property
Value
One of the following unsigned short values:
| Value | State | Description |
|---|---|---|
0 |
CONNECTING |
Socket has been created. 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 |
|---|
| WebSockets Standard # ref-for-dom-websocket-readystate① |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
readyState |
5 | 12 | 7 | 10 | 12.1 | 5 | 4.4 | 18 | 7 | 12.1 | 4.2 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/readyState