27 lines
722 B
TypeScript
27 lines
722 B
TypeScript
import { useLayoutEffect, useState } from "react"
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/** Tailwind `sm` breakpoint — viewports below are treated as xs. */
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export const XS_MAX_PX = 639
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const XS_MQ = `(max-width: ${XS_MAX_PX}px)`
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/** Sync read for event handlers / layout (no hook delay). */
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export function readXsMatches(): boolean {
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if (typeof window === "undefined") return false
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return window.matchMedia(XS_MQ).matches
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}
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export function useIsXs() {
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const [isXs, setIsXs] = useState(false)
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useLayoutEffect(() => {
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const mql = window.matchMedia(XS_MQ)
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const update = () => setIsXs(mql.matches)
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update()
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mql.addEventListener("change", update)
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return () => mql.removeEventListener("change", update)
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}, [])
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return isXs
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}
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