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157.[vue]你怎么理解vue中的diff算法？ #157

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webVueBlog opened this issue Apr 2, 2020 · 1 comment

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webVueBlog commented Apr 2, 2020

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webVueBlog commented Apr 2, 2020

virtual dom，也就是虚拟节点，它通过JS的Object对象模拟DOM中的节点，然后再通过特定的render方法将其渲染成真实的DOM节点。

新旧虚拟dom的差异比较方法称为diff算法

简单的说就是新旧虚拟dom 的比较，如果有差异就以新的为准，然后再插入的真实的dom中，重新渲染
特点: 只会做同级比较，不做跨级比较

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