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Vue中key的作用 #74

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Liqiuyue9597 opened this issue Dec 2, 2020 · 0 comments

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Vue 京东字节跳动腾讯

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Liqiuyue9597 commented Dec 2, 2020

在进行v-for的时候要求必须要绑定key，而且key最好不是数组的index，原因是：
Vue底层在进行virtual DOM对比更新时，最后一步就是对比DOM的key是不是相同，相同就判断为同一个DOM节点，所以最好给节点都绑定唯一的ID为key

Liqiuyue9597 added Vue 字节跳动腾讯京东 labels

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