apart from default hooks like useState and useEffect, if you wanna have custom hooks ie functions that react to a change we can do it by following

ex - a hook to check if the device is mobile and rendering based on this

import { useEffect, useState } from "react";

const MOBILE_BREAKPOINT = 768;

export function useIsMobile(breakpoint: number = MOBILE_BREAKPOINT) {
  const [isMobile, setIsMobile] = useState(false);

  useEffect(() => {
    const query = window.matchMedia(`(max-width: ${breakpoint - 1}px)`);
    const onChange = () => setIsMobile(query.matches);
  
    onChange();
    query.addEventListener("change", onChange);
    return () => query.removeEventListener("change", onChange);
  }, [breakpoint]);

  return isMobile;
}