vue3之插槽

注意点：
- 就是 v-slot:XX 可简写为 #XX
- 若是v-slot 后面不带插槽名称什么的简写为 #default

默认插槽

B.vue 子组件

<template>
  <div>
    <div class="header">
      <slot></slot>
    </div>
  </div>
</template>

<script setup lang="ts"></script>
<script>
export default {
  name: 'B',
}
</script>
<style lang="scss" scoped></style>

Main.vue 父组件

<template>
  <div class="main">
    <B>
      <!-- <template v-slot>我是默认插槽哦</template> -->
      <template #default>我是默认插槽哦</template>
    </B>
  </div>
</template>

<script setup lang="ts">
import B from './childCom/B.vue'
</script>

效果

具名插槽

B.vue

<template>
  <div>
    <div class="main">
      <!-- 给当前插槽的 默认值 -->
      <!-- <slot name="mian">我是main</slot> -->
      <slot name="main"></slot>
    </div>
  </div>
</template>

<script setup lang="ts"></script>
<script>
export default {
  name: 'B',
}
</script>
<style lang="scss" scoped></style>

Main.vue

<template>
  <div class="main">
    <B>
      <!-- <template v-slot:main>我是具名插槽 main</template> -->
      <template #main>我是具名插槽 main</template>
    </B>
  </div>
</template>

<script setup lang="ts">
import B from './childCom/B.vue'
</script>

效果

作用域插槽

就是子组件可给父组件传递数据，以作用域插槽的形式
B.vue

<template>
  <div>
    <!-- 作用域插槽 -->
    <div class="footer">
      <div v-for="(item, idx) in nameArr" :key="idx">
        <!-- 向父组件 传递数据 以data接受 -->
        <slot :data="item"></slot>
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
import { reactive } from 'vue'
type nameArr = {
  name: String
  age: Number
}
const nameArr = reactive<nameArr[]>([
  {
    name: '被插入1次',
    age: 10,
  },
  {
    name: '被插入2次',
    age: 20,
  },
  {
    name: '被插入3次',
    age: 30,
  },
])
</script>

Main.vue

<template>
  <div class="main">
    <B>
      <!-- 作用域插槽 子组件向父组件 传递数据 data -->
      <!-- <template v-slot="{ data }"> 我{{ data.age }}岁 -- {{ data.name }} </template> -->
      <template #default="{ data }"> 我{{ data.age }}岁 -- {{ data.name }} </template>
    </B>
  </div>
</template>

<script setup lang="ts">
import B from './childCom/B.vue'
</script>

效果

动态数据写入插槽

B.vue

<template>
  <div>
    <!-- 给当前插槽的 默认值 -->
    <div class="header">
      <slot name="header">我是头部</slot>
    </div>
    <div class="main">
      <slot name="main">我是主体</slot>
    </div>
  </div>
</template>

<script setup lang="ts">
import { reactive } from 'vue'
</script>
<style lang="scss" scoped></style>

Main.vue

<template>
  <div class="main">
    {{ name }}
    <B>
      <template #[name]>
        <div>我在哪里</div>
      </template>
    </B>
  </div>
</template>

<script setup lang="ts">
import B from './childCom/B.vue'
import { reactive, ref, markRaw } from 'vue'
const name = ref('main')
</script>
<style lang="scss" scoped>
.main {
  flex: 1;
  margin: 14px;
  border: 1px solid #ccc;
  overflow: auto;
}
</style>