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react文档中说的派生状态是什么意思？

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react文档中说的派生状态是什么意思？

https://zh-hans.reactjs.org/b...

你可能不需要使用派生 state


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就是某个state是由prop派生出来的，你再阅读下文档中所述的几个反面案例就理解了


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