@ -20,3 +20,12 @@ do {
flushRenderPhaseStrictModeWarningsInDEV();
```
中间跳过一段逻辑无关和 performance 监控代码,进入对 Fiber Tree 属性的一系列初始化
```javascript
root.finishedWork = null;
root.finishedLanes = NoLanes;
root.callbackNode = null;
root.callbackPriority = NoLane;