Function useState

packages/nerv/src/hooks.ts:67–84

(initialState: S | (() => S))

export type Hook = HookEffect & HookState<unknown> & HookReducer<any, unknown> & HookRef<unknown> & HookCallback<any> & HookContext

export function useState<S> (initialState: S | (() => S)): [S, Dispatch<SetStateAction<S>>] {
  if (isFunction(initialState)) {
    initialState = initialState()
  }
  const hook = getHooks(Current.index++) as HookState<S>
  if (!hook.state) {
    hook.component = Current.current!
    hook.state = [
      initialState,
      (action) => {
        hook.state[0] = isFunction(action) ? action(hook.state[0]) : action
        hook.component._disable = false
        hook.component.setState({})
      }
    ]
  }
  return hook.state
}

export function useReducer<R extends Reducer<any, any>, I> (
  reducer: R,