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useMeasure - taken from React Spring example
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| import { useRef, useState, useEffect } from 'react' | |
| import ResizeObserver from 'resize-observer-polyfill' | |
| export default function useMeasure() { | |
| const ref = useRef() | |
| const [bounds, set] = useState({ left: 0, top: 0, width: 0, height: 0 }) | |
| const [ro] = useState(() => new ResizeObserver(([entry]) => set(entry.contentRect))) | |
| useEffect(() => (ro.observe(ref.current), ro.disconnect), []) | |
| return [{ ref }, bounds] | |
| } |
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