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WebSocket: readyState property

The WebSocket.readyState read-only property returns the current state of the WebSocket connection.

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

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