How to detect if screen size has changed to mobile in React?

Question

I am developing a web app with React and need to detect when the screen size has entered the mobile break-point in order to change the state. Specifically I need my sidenav to b

Answer 1

Using hooks in React(16.8.0+) refering to: https://stackoverflow.com/a/36862446/1075499

import { useState, useEffect } from 'react';

function getWindowDimensions() {
  const { innerWidth: width, innerHeight: height } = window;
  return {
    width,
    height
  };
}

export default function useWindowDimensions() {
  const [windowDimensions, setWindowDimensions] = useState(getWindowDimensions());

  useEffect(() => {
    function handleResize() {
      setWindowDimensions(getWindowDimensions());
    }

    window.addEventListener('resize', handleResize);
    return () => window.removeEventListener('resize', handleResize);
  }, []);

  return windowDimensions;
}