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问题

使用 ref 的性能警告 代码如下

<template>
  <div>
    <component :is="currentTabComponent"></component>
  </div>
</template>

<script setup>

import { ref,shallowRef } from "vue";
import TodoList from "./components/TodoList.vue";
import Rate from "./components/Rate.vue";

let tabs ={
  TodoList,
  Rate
}
let currentTabComponent = ref(TodoList)
</script>

警告

runtime-core.esm-bundler.js:6591 [Vue warn]: Vue received a Component which was made a reactive object. This can lead to unnecessary performance overhead, and should be avoided by marking the component with

markRaw

or using

shallowRef

instead of

ref

. Component that was made reactive:

译文：

runtime-core.esm-bundler.js:6591 [Vue 警告]：Vue 收到一个组件，该组件已成为响应式对象。这会导致不必要的性能开销，应该通过使用

markRaw

标记组件或使用

shallowRef

代替

ref

来避免。被响应的组件：

markRaw: 标记一个对象，使其永远不会转换为 proxy。返回对象本身。

shallowRef: 创建一个跟踪自身 .value 变化的 ref，但不会使其值也变成响应式的。

解决

我通过将对象标记为shallowRef解决了这个问题

因此，不要将组件存储在您的状态中，而是存储对它的键控引用，并针对对象进行查找

完整代码

<template>
  <div>
    <h1>带动画的Todolist</h1>
    <button
      v-for="(i,tab) in tabs"
      :key="i"
      :class="['tab-button', { active: currentTabComponent === tab }]"
      @click="fn(tab)"
    >
      {{ tab }}
    </button>
    <component :is="currentTabComponent"></component>
  </div>
</template>

<script setup>

import { ref,shallowRef } from "vue";
import TodoList from "./components/TodoList.vue";
import Rate from "./components/Rate.vue";

let tabs ={
  TodoList,
  Rate
}
let currentTabComponent = shallowRef(TodoList)

function fn (tab){
  currentTabComponent.value = tabs[tab]
}
</script>