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import { useTransition, useState, useCallback } from 'react';
export function useNonBlockingFilter(initialItems: T[], filterFn: (item: T, q: string) => boolean) {
const [query, setQuery] = useState('');
const [filtered, setFiltered] = useState(initialItems);
const [isPending, startTransition] = useTransition();
const updateFilter = useCallback((nextQuery: string) => {
// Immediate visual input update for <50ms INP
setQuery(nextQuery);
// Yield main thread before heavy filtering render
startTransition(() => {
setFiltered(initialItems.filter((item) => filterFn(item, nextQuery)));
});
}, [initialItems, filterFn]);
return { query, filtered, isPending, updateFilter };
}