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:
| 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 | 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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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