CloseEvent: wasClean 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 wasClean read-only property of the CloseEvent interface returns true if the connection closed cleanly.

Value

A boolean value. True if the connection closed cleanly, false otherwise.

The following example prints the value of wasClean to the console.

WebSocket.onclose = (event) => {
 console.log(event.wasClean);
};

Specification
WebSockets # ref-for-dom-closeevent-wasclean2

This page was last modified on Sep 25, 2024 by MDN contributors.