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wenzi0github / react

react源码的解析和学习

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what time nextWorkInProgressHook is null but nextCurrentHook not in updateWorkInProgressHook?

wenzi0github opened this issue · comments

commented

when nextWorkInProgressHook is null but nextCurrentHook not in updateWorkInProgressHook?

react/packages/react-reconciler/src/ReactFiberHooks.old.js

Line 721 in 8af5b16

// Clone from the current hook.

commented

ok, I got it.

Before updateWorkInProgressHook(), it will change workInProgress.memoizedState to null, and change currentlyRenderingFiber too. That means nextWorkInProgressHook always is null when rerendered by useState().

So, I have the second question, what time nextWorkInProgressHook will be not null.