26 lines
886 B
TypeScript
26 lines
886 B
TypeScript
import * as React from "react"
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const MOBILE_BREAKPOINT = 768
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export function useIsMobile() {
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// Read on the first render, not after it: a node on the flow canvas draws
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// its handles for the direction this returns, and React Flow measures them
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// once. Starting at `false` drew them for a desktop first, so whether an
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// edge met its handle depended on which of the two React measured.
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const [isMobile, setIsMobile] = React.useState(
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() => window.innerWidth < MOBILE_BREAKPOINT,
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)
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React.useEffect(() => {
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const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
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const onChange = () => {
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setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
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}
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mql.addEventListener("change", onChange)
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setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
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return () => mql.removeEventListener("change", onChange)
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}, [])
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return isMobile
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}
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