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oliver1204 avatar oliver1204 commented on July 28, 2024

几篇个人认为比较好的文章

所有通过react生命周期阶段调用的setstate都是非同步的，因为每次setstate都会触发更新阶段的生命周期所以按照正常react用法都是会经过batchingUpdate方法的。这是由于react有一套自定义的事件系统和生命周期流程控制，使用原生事件监听和settimeout这种方式会跳出react这个体系，所以会直接更新this.state。

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oliver1204 avatar oliver1204 commented on July 28, 2024

附上一张react 生命周期图好不好，不过16.0 中新添的 componentDidCatch 和 16.3 新添的getDerivedStateFromProps、getSnapshotBeforeUpdate 不在其中。

image

v16.3 后的生命周期图

image

v16.4 后的生命周期图

image

具体缘由

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oliver1204 avatar oliver1204 commented on July 28, 2024

setState 如何知道该做什么？

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