web api instance property
CloseEvent: reason property
Available in workers
The reason read-only property of the CloseEvent interface returns the WebSocket connection close reason the server gave for closing the connection; that is, a concise human-readable prose explanation for the closure.
Value
A string.
Examples
The following example prints the value of reason to the console.
WebSocket.onclose = (event) => {
console.log(event.reason);
};
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.
See also
- RFC 6455 (the WebSocket Protocol specification)