Vue3中的动态组件详解

<template>
  <div>
    A component
  </div>
</template>

<script setup lang="ts">

</script>

<style scoped></style>

<template>
  <div style="display: flex;">
    <!-- class可以写两个，一个静态，一个动态 -->
    <div @click="switchCom(item, index)" :class="[active == index ? 'active' : '']" class="tabs"
      v-for="(item, index) in data">
      <div>{{ item.name }}</div>
    </div>
  </div>
  <component :is="comId"></component>
</template>

<script setup lang="ts">
import { ref, reactive } from 'vue';
import AVue from './components/A.vue'
import BVue from './components/B.vue'
import CVue from './components/C.vue'
// 这里不需要将对象中所有数据变为响应式，可以使用ref
const comId = ref(AVue)
const active = ref(0)

const switchCom = (item, index) => {
  comId.value = item.com
  active.value = index
}

const data = reactive([
  {
    name: 'A',
    com: AVue
  },
  {
    name: 'B',
    com: BVue
  },
  {
    name: 'C',
    com: CVue
  }
])
</script>

<style lang="scss" scoped>
.active {
  background: blueviolet;
}

.tabs {
  border: 1px solid #ccc;
  padding: 5px 10px;
  margin: 5px;
  cursor: pointer;

}
</style>

<template>
  <div style="display: flex;">
    <!-- class可以写两个，一个静态，一个动态 -->
    <div @click="switchCom(item, index)" :class="[active == index ? 'active' : '']" class="tabs"
      v-for="(item, index) in data">
      <div>{{ item.name }}</div>
    </div>
  </div>
  <component :is="comId"></component>
</template>

<script setup lang="ts">
// markRaw：作用：标记一个对象，使其永远不会再成为响应式对象。
import { ref, reactive, markRaw, shallowRef } from 'vue';

// 这里不需要将对象中所有数据变为响应式，可以使用ref
const comId = shallowRef('AVue')
const active = ref(0)

const switchCom = (item, index) => {
  comId.value = item.com
  console.log(comId.value);
  
  active.value = index
}

const data = reactive([
  {
    name: 'A',
    com:'AVue'
  },
  {
    name: 'B',
    com:'BVue'
  },
  {
    name: 'C',
    com:'CVue'
  }
])
</script>

<script lang="ts">
import AVue from './components/A.vue'
import BVue from './components/B.vue'
import CVue from './components/C.vue'

export default {
  components: {
    AVue,
    BVue,
    CVue
  }
}
</script>

<style lang="scss" scoped>
.active {
  background: blueviolet;
}

.tabs {
  border: 1px solid #ccc;
  padding: 5px 10px;
  margin: 5px;
  cursor: pointer;

}
</style>

<template>
  <div style="display: flex;">
    <!-- class可以写两个，一个静态，一个动态 -->
    <div @click="switchCom(item, index)" :class="[active == index ? 'active' : '']" class="tabs"
      v-for="(item, index) in data">
      <div>{{ item.name }}</div>
    </div>
  </div>
  <component :is="comId"></component>
</template>

<script setup lang="ts">
// markRaw：作用：标记一个对象，使其永远不会再成为响应式对象。
import { ref, reactive, markRaw, shallowRef } from 'vue';
import AVue from './components/A.vue'
import BVue from './components/B.vue'
import CVue from './components/C.vue'
// 这里不需要将对象中所有数据变为响应式，可以使用ref
const comId = shallowRef(AVue)
const active = ref(0)

const switchCom = (item, index) => {
  comId.value = item.com
  console.log(comId.value);
  
  active.value = index
}

const data = reactive([
  {
    name: 'A',
    com: markRaw(AVue)
  },
  {
    name: 'B',
    com: markRaw(BVue)
  },
  {
    name: 'C',
    com: markRaw(CVue)
  }
])
</script>

<style lang="scss" scoped>
.active {
  background: blueviolet;
}

.tabs {
  border: 1px solid #ccc;
  padding: 5px 10px;
  margin: 5px;
  cursor: pointer;

}
</style>