mountHooks 和 updateHooks 执行根本一样，多了 deps 判断

mountWorkInProgressHook: 执行函数组件时 —— Component(props, secondArg)，hooks 执行；挂载到 fiber.memoizedState 下

function mountWorkInProgressHook() {  var hook = {    memoizedState: null,    baseState: null,    baseQueue: null,    queue: null,    next: null,  };  if (workInProgressHook === null) {    currentlyRenderingFiber$1.memoizedState = workInProgressHook = hook;  } else {    workInProgressHook = workInProgressHook.next = hook;  }  return workInProgressHook;}

useEffect

mountEffectImpl

function mountEffectImpl(fiberFlags: number, hookFlags: number, create, deps) {  var hook = mountWorkInProgressHook();  var nextDeps = deps === undefined ? null : deps;  currentlyRenderingFiber$1.flags |= fiberFlags;  hook.memoizedState = pushEffect(    HasEffect | hookFlags,    create,    undefined,    nextDeps  );}

pushEffect: updateQueue 放入要更新到 effect

function pushEffect(tag, create, destroy, deps) {  var effect = {    tag: tag,    create: create,    destroy: destroy,    deps: deps,    next: null,  };  var componentUpdateQueue = currentlyRenderingFiber$1.updateQueue;  if (componentUpdateQueue === null) {    componentUpdateQueue = createFunctionComponentUpdateQueue();    currentlyRenderingFiber$1.updateQueue = componentUpdateQueue;    componentUpdateQueue.lastEffect = effect.next = effect;  } else {    var lastEffect = componentUpdateQueue.lastEffect;    if (lastEffect === null) {      componentUpdateQueue.lastEffect = effect.next = effect;    } else {      var firstEffect = lastEffect.next;      lastEffect.next = effect;      effect.next = firstEffect;      componentUpdateQueue.lastEffect = effect;    }  }  return effect;}

useState

mountState

function mountState(initialState) {  var hook = mountWorkInProgressHook();  // 是办法，先执行失去 初始值  if (typeof initialState === "function") {    initialState = initialState();  }  hook.memoizedState = hook.baseState = initialState;  var queue = (hook.queue = {    pending: null,    dispatch: null,    lastRenderedReducer: basicStateReducer,    lastRenderedState: initialState,  });  var dispatch = (queue.dispatch = dispatchAction.bind(    null,    currentlyRenderingFiber$1,    queue  ));  return [hook.memoizedState, dispatch];}