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# beginWork 和 completeWork
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在 [[React 源码的碎片记录]] 中写了，在 React 的 Fiber 递归阶段会有两个函数，分别执行递和归两个动作，它们就是 beginWork 和 completeWork
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```javascript
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function beginWork(current, workInProgress, renderLanes) {}
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```
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