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1 2 3 4 5 6 7 8 9 10 11 12 | 1x 1x 1x 1x 1x | import React from 'react'; const usePreviousState = (prevState) => { const ref = React.useRef(); React.useEffect(() => { ref.current = prevState; }); return ref.current; }; export default usePreviousState; |