react-hook-update v0.0.1

react-demo

• Case1, The original version of useReducer: One more re-render with virtual DOM. The Child virtual Dom Will not be re-render.

• Case2, useMemo version: cache variable to saving calculations, Other behaviors remain consistent as Case1, Still one more refresh, and the Child virtual Dom Will not be re-render.

• Case3, Custom hook version: Not excessive refresh, and exposed to stateRef.current to get current state.

• reference github issue