@hkxdv/astro-shade-dx-template/templates/demo/src/hooks/useMobile.ts

Astro template with React, shadcn/ui, Bun, Biome & ESLint. Pre-configured TypeScript, Tailwind CSS, dark/light themes, and optimized DX. Run directly with 'bunx @hkxdv/astro-shade-dx-template' without installation.

import * as React from "react";

const MOBILE_BREAKPOINT = 768;

export function useIsMobile() {
  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(
    undefined
  );

  React.useEffect(() => {
    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`);
    const onChange = () => {
      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT);
    };
    mql.addEventListener("change", onChange);
    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT);
    return () => mql.removeEventListener("change", onChange);
  }, []);

  return !!isMobile;
}