Web/API/WebSocket/readyState

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 StandardThe 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	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
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

WebSocket.readyState by Mozilla Contributors is licensed under CC-BY-SA 2.5.