close(code, reason) A parameter or an operation is not supported by the underlying object

[cgarrovillo]

Calling close(code,reason) with arguments throws an error:

Uncaught DOMException: A parameter or an operation is not supported by the underlying object
close reconnecting-websocket-mjs.js:374

Calling close() with no arguments closes the connection just fine.

This is happening when trying to be used in a React component, where the ReconnectingWebSocket object .close() is called on is a reference using React.useRef()

[franky47]

What is your value for code?

This error is thrown by the underlying WebSocket when calling close with invalid arguments. If you specify code, it has to be within the 3000-4999 range, and accompanied by a reason string, according to the spec:
https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/close#parameters