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.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
readyState | Chrome Full support 43 | Edge Full support 12 | Firefox Full support 19 | IE Full support 10 | Opera Full support 30 | Safari Full support 10 | WebView Android Full support 43 | Chrome Android Full support 43 | Firefox Android Full support 19 | Opera Android Full support 30 | Safari iOS Full support 10 | Samsung Internet Android Full support 4.0 |
Legend
- Full support
- Full support