No double click detection with useEffect

[carlosporta]

I am trying to detect double clicks and single clicks on buttons.

function App() {
  const buttonRef = useRef();
  const [message, setMessage] = useState();
  const [ws, setWS] = useState();

  useEffect(() => {
   const localWS = new WebSocket('ws://192.168.31.104:8000/ws');
    localWS.onmessage = (event) => {}
  }, []);

  useDoubleClick({
    onSingleClick: e => {
      console.log(e, 'single click');
    },
    onDoubleClick: e => {
      console.log(e, 'double click');
    },
    ref: buttonRef,
    latency: 250
  });

  return <button ref={buttonRef}>Click Me</button>
}
export default App;

This function works perfectly, but when I try to change a state variable, the useDoubleClick hooks stops to detect double clicks.

function App() {
  const buttonRef = useRef();
  const [message, setMessage] = useState();
  const [ws, setWS] = useState();

  useEffect(() => {
    const localWS = new WebSocket('ws://192.168.31.104:8000/ws');
    localWS.onmessage = (event) => {
      setMessage(JSON.parse(event.data)) // HERE
      setWS(localWS); // HERE
    }
  }, []);
  
  useDoubleClick({
    onSingleClick: e => {
      console.log(e, 'single click');
    },
    onDoubleClick: e => {
      console.log(e, 'double click');
    },
    ref: buttonRef,
    latency: 250
  });
  
  return <button ref={buttonRef}>Click Me</button>

}

What am I doing wrong?

[vedro-compota]

can you create small demo app to check this problem?

[episode17]

Late but I was exploring this recently: The hook has no dependency array in it's useEffect so your setState is resetting the internal click count, resulting in only single clicks being registered.

[tim-soft]

Does this sandbox work for you?

https://codesandbox.io/s/use-double-click-f7e33?expanddevtools=1&fontsize=14

Feel free to provide a repro of it not working

[TomerHir]

this pr will solve your issue once it's verified as production-ready:
#32

additionally, you could THEORETICALLY add this component to your code and use it instead of directly calling useDoubleClick but... better wait for the PR to pass

/**
 * component that handles a rerender in the middle of the double click event.
 * yes.
 * seriously.
 */
const DoubleClickComponent = memo(function DoubleClickComponent<TClickableHTML extends HTMLElement>({
	onSingleClick,
	onDoubleClick,
	clickableRef,
	latency,
}: {
	onSingleClick: (e: MouseEvent) => void;
	onDoubleClick: (e: MouseEvent) => void;
	clickableRef: MutableRefObject<TClickableHTML>;
	latency?: number;
}) {
	useDoubleClick({
		onSingleClick,
		onDoubleClick,
		ref: clickableRef,
		latency: latency,
	});
	return null;
});