Returns a callback function that forcibly re-renders its component. The returned function is guaranteed to be up-to-date in the component lifecycle, so it doesn't need to be given as a dependency to useEffect (comparable to the state dispatcher returned by useState). You can, however, provide the .key field to a React dependency array to trigger effects as a result of invoking the callback.
const forceUpdate = useForceUpdate();
// Somewhere in the component...
forceUpdate(); // re-render!
// Somewhere else in the component...
// Trigger an effect using `forceUpdate`.
useEffect(() => {
...
}, [forceUpdate.key]);