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React丨props，state 和 render #4

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wangjianuo opened this issue Jun 17, 2019 · 0 comments
Closed

React丨props，state 和 render #4

wangjianuo opened this issue Jun 17, 2019 · 0 comments

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@wangjianuo
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小记：

当组件的state和props发生改变的时候，render函数会重新执行一次。

当父组件的render执行了，所有的子组件的render都会执行一次。
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