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React 的官方文档中建议在 componentDidMount 中执行有副作用的操作,比如发起 ajax 请求,相信很多人读到过这一建议,并且在日常工作中也是这样遵循的。但是问什么会有这样的建议呢?React 项目中有这样一个 issue,讨论的就是这一建议背后的原因:
reactjs/react.dev#302