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[vue] 14. vue 中 key 值的作用 #405

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qiilee opened this issue Oct 8, 2019 · 1 comment

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qiilee commented Oct 8, 2019

答案：

需要使用 key 来给每个节点做一个唯一标识，Diff 算法就可以正确的识别此节点，找到正确的位置区插入新的节点
所以一句话，key 的作用主要是为了高效的更新虚拟 DOM

qiilee added the VUE label

tnnevol commented May 14, 2024

key 值小技巧，可以通过变动key做到重新初始化组件

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