WebSocket: readyState property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The WebSocket.readyState
read-only property returns the
current state of the WebSocket
connection.
Value
A number which is one of the four possible state constants defined on the WebSocket
interface:
WebSocket.CONNECTING
(0)-
Socket has been created. The connection is not yet open.
WebSocket.OPEN
(1)-
The connection is open and ready to communicate.
WebSocket.CLOSING
(2)-
The connection is in the process of closing.
WebSocket.CLOSED
(3)-
The connection is closed or couldn't be opened.
Specifications
Specification |
---|
WebSockets # ref-for-dom-websocket-readystate① |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
readyState |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
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.