Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | import { useCallback, useState } from "react"; const useToggleableList = <T>(initialState: T[]) => { const [values, setValues] = useState<T[]>(initialState); const set = useCallback((id: T) => { setValues((value) => ([] as T[]).concat(value, id)); }, []); const unset = useCallback((id: T) => { setValues((value) => value.filter((s) => s !== id)); }, []); const isSet = useCallback( (id: T) => { return values.includes(id); }, [values] ); const toggle = useCallback( (id: T) => { if (isSet(id)) { unset(id); } else { set(id); } }, [isSet, set, unset] ); return { values, setValues, isSet, toggle, set, unset } as const; }; export default useToggleableList; |