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为什么 React 16 版本中 render 阶段放弃了使用递归 #85

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nmsn opened this issue Feb 3, 2023 · 1 comment

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nmsn commented Feb 3, 2023

如题

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nmsn commented Feb 3, 2023 •

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因为递归是不能被中止的，需要一直占用线程，而 JS 又是属于单线程, 所以当我们需要执行操作时，是不能被中断的，一旦执行，则需要全部操作执行完成后，才可释放线程

在这种情况下，我们在第一次渲染的时候，程序需要将生成 Dom 和包含事件全部准备齐全后，才会添加元素到页面，并展示到浏览器，而用户看到的是，一直在等待中，才可看到画面，会导致用户体验极差

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