| 1 | import * as React from "react"; |
| 2 | |
| 3 | const MOBILE_BREAKPOINT = 768; |
| 4 | |
| 5 | export function useIsMobile() { |
| 6 | const [isMobile, setIsMobile] = React.useState<boolean | undefined>( |
| 7 | undefined, |
| 8 | ); |
| 9 | |
| 10 | React.useEffect(() => { |
| 11 | const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`); |
| 12 | const onChange = () => { |
| 13 | setIsMobile(window.innerWidth < MOBILE_BREAKPOINT); |
| 14 | }; |
| 15 | mql.addEventListener("change", onChange); |
| 16 | setIsMobile(window.innerWidth < MOBILE_BREAKPOINT); |
| 17 | return () => mql.removeEventListener("change", onChange); |
| 18 | }, []); |
| 19 | |
| 20 | return !!isMobile; |
| 21 | } |
| 22 |