1  import { useEffect, useState } from "react"
 2  
 3  const MOBILE_BREAKPOINT = 768;
 4  
 5  export function useIsMobile(): boolean {
 6    const [isMobile, setIsMobile] = useState(window.innerWidth < MOBILE_BREAKPOINT);
 7  
 8    useEffect(() => {
 9      const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`);
10      const onChange = () => {
11        setIsMobile(window.innerWidth < MOBILE_BREAKPOINT);
12      }
13      mql.addEventListener("change", onChange);
14      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT);
15      return () => mql.removeEventListener("change", onChange);
16    }, []);
17  
18    return !!isMobile;
19  }