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Vue v-memo 指令


示例

使用 v-memo 指令仅在 updateProp 属性值更改时重新渲染。

<div 
  v-for="x in circle" 
  :style="{ backgroundColor: x.color }" 
  v-memo="[updateProp]"
></div>
运行示例 »

定义和用法

v-memo 指令用于优化 Vue 中的性能。

为了优化性能,v-memo 与属性数组一起使用,v-memo 将阻止元素及其所有子元素的重新渲染,直到其中一个属性发生更改。

只有在罕见情况下,例如使用 v-for 创建的大型列表时,v-memo 才能优化性能。

如果与 v-memo 一起提供的数组为空,例如:v-memo="[]",您将获得与 v-once 相同的功能。


相关页面

Vue 教程:Vue v-for 指令

Vue 教程:Vue v-bind 指令

Vue 教程:Vue CSS 绑定

Vue 参考:Vue v-for 指令

Vue 参考:Vue v-once 指令

JavaScript 参考:Window setTimeout()


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