FiberRootNode-18

  function FiberRootNode(containerInfo, tag, hydrate, identifierPrefix, onRecoverableError) {
    console.log('==欢迎来到A FiberRootNode!===')
    this.tag = tag;
    this.containerInfo = containerInfo;
    this.pendingChildren = null;
    this.current = null;
    this.pingCache = null;
    this.finishedWork = null;
    this.timeoutHandle = noTimeout;
    this.context = null;
    this.pendingContext = null;
    this.callbackNode = null;
    this.callbackPriority = NoLane;
    this.eventTimes = createLaneMap(NoLanes);
    this.expirationTimes = createLaneMap(NoTimestamp);
    this.pendingLanes = NoLanes;
    this.suspendedLanes = NoLanes;
    this.pingedLanes = NoLanes;
    this.expiredLanes = NoLanes;
    this.mutableReadLanes = NoLanes;
    this.finishedLanes = NoLanes;
    this.entangledLanes = NoLanes;
    this.entanglements = createLaneMap(NoLanes);
    this.identifierPrefix = identifierPrefix;
    this.onRecoverableError = onRecoverableError;

    {
      this.mutableSourceEagerHydrationData = null;
    }

    {
      this.effectDuration = 0;
      this.passiveEffectDuration = 0;
    }

    {
      this.memoizedUpdaters = new Set();
      var pendingUpdatersLaneMap = this.pendingUpdatersLaneMap = [];

      for (var _i = 0; _i < TotalLanes; _i++) {
        pendingUpdatersLaneMap.push(new Set());
      }
    }

    {
      switch (tag) {
        case ConcurrentRoot:
          this._debugRootType = hydrate ? 'hydrateRoot()' : 'createRoot()';
          break;

        case LegacyRoot:
          this._debugRootType = hydrate ? 'hydrate()' : 'render()';
          break;
      }
    }
  }