web api event
WebSocket: close event
Available in workers
The close event is fired when a connection with a WebSocket is closed.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("close", (event) => { })
onclose = (event) => { }
Event type
A CloseEvent. Inherits from Event.
Examples
You might want to know when the connection has been closed so that you can update the UI or, perhaps, save data about the closed connection. Given that you have a variable called exampleSocket that refers to an opened WebSocket, this handler would handle the situation where the socket has been closed.
exampleSocket.addEventListener("close", (event) => {
console.log("The connection has been closed successfully.");
});
You can perform the same actions using the event handler property, like this:
exampleSocket.onclose = (event) => {
console.log("The connection has been closed successfully.");
};
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.