@hkxdv/astro-shade-dx-template/templates/base/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
}