manifold/web/hooks/use-state-check-equality.ts

22 lines
495 B
TypeScript

import _ from 'lodash'
import { useMemo, useRef, useState } from 'react'
export const useStateCheckEquality = <T>(initialState: T) => {
const [state, setState] = useState(initialState)
const stateRef = useRef(state)
stateRef.current = state
const checkSetState = useMemo(
() => (newState: T) => {
const state = stateRef.current
if (!_.isEqual(state, newState)) {
setState(newState)
}
},
[stateRef]
)
return [state, checkSetState] as const
}