react-use/src/factory/createBreakpoint.ts

import { useEffect, useMemo, useState } from 'react';
import { isBrowser, off, on } from '../misc/util';

const createBreakpoint =
  (breakpoints: { [name: string]: number } = { laptopL: 1440, laptop: 1024, tablet: 768 }) =>
  () => {
    const [screen, setScreen] = useState(isBrowser ? window.innerWidth : 0);

    useEffect(() => {
      const setSideScreen = (): void => {
        setScreen(window.innerWidth);
      };
      setSideScreen();
      on(window, 'resize', setSideScreen);
      return () => {
        off(window, 'resize', setSideScreen);
      };
    });
    const sortedBreakpoints = useMemo(
      () => Object.entries(breakpoints).sort((a, b) => (a[1] >= b[1] ? 1 : -1)),
      [breakpoints]
    );
    const result = sortedBreakpoints.reduce((acc, [name, width]) => {
      if (screen >= width) {
        return name;
      } else {
        return acc;
      }
    }, sortedBreakpoints[0][0]);
    return result;
  };

export default createBreakpoint;