嵌套

我们可以使用递归组件来实现嵌套的效果。

TIP

本章使用了自定义双向绑定的方式，如果您对此还不是很了解，请先查阅自定义双向绑定的资料，vue2 和 vue3 有所不同。

组件使用

• item 1

  • item 2

• item 3

  • item 4

• item 5

[
  {
    "name": "item 1",
    "children": [
      {
        "name": "item 2",
        "children": []
      }
    ]
  },
  {
    "name": "item 3",
    "children": [
      {
        "name": "item 4",
        "children": []
      }
    ]
  },
  {
    "name": "item 5",
    "children": []
  }
]

使用组件方式

复制成功!

<template>
  <div class="flex justify-between">
    <nested-draggable v-model="list" class="w-full"></nested-draggable>
    <preview-list :list="list" />
  </div>
</template>

<script setup lang="ts">
import { ref } from 'vue'
import NestedDraggable from './NestedComponent.vue'

const list = ref([
  {
    name: 'item 1',
    children: [
      {
        name: 'item 2',
        children: []
      }
    ]
  },
  {
    name: 'item 3',
    children: [
      {
        name: 'item 4',
        children: []
      }
    ]
  },
  {
    name: 'item 5',
    children: []
  }
])
</script>

NestedComponent.vue

<template>
  <VueDraggable class="drag-area" tag="ul" v-model="list" group="g1">
    <li v-for="el in modelValue" :key="el.name">
      <p>{{ el.name }}</p>
      <nested-component v-model="el.children" />
    </li>
  </VueDraggable>
</template>
<script setup lang="ts">
import { VueDraggable } from 'vue-draggable-plus'
import { computed } from 'vue'

interface IList {
  name: string
  children: IList[]
}

interface Props {
  modelValue: IList[]
}

const props = defineProps<Props>()

interface Emits {
  (e: 'update:modelValue', value: IList[]): void
}

const emits = defineEmits<Emits>()
const list = computed({
  get: () => props.modelValue,
  set: value => emits('update:modelValue', value)
})
</script>
<style scoped>
.drag-area {
  min-height: 50px;
  outline: 1px dashed;
}
</style>

函数使用

• item 1

  • item 2

• item 3

  • item 4

• item 5

[
  {
    "name": "item 1",
    "children": [
      {
        "name": "item 2",
        "children": []
      }
    ]
  },
  {
    "name": "item 3",
    "children": [
      {
        "name": "item 4",
        "children": []
      }
    ]
  },
  {
    "name": "item 5",
    "children": []
  }
]

传递函数选项实现

复制成功!

<template>
  <div class="flex justify-between">
    <NestedFunction v-model="list" class="w-full"></NestedFunction>
    <preview-list :list="list" />
  </div>
</template>

<script setup lang="ts">
import { ref } from 'vue'
import NestedFunction from './NestedFunction.vue'

const list = ref([
  {
    name: 'item 1',
    children: [
      {
        name: 'item 2',
        children: []
      }
    ]
  },
  {
    name: 'item 3',
    children: [
      {
        name: 'item 4',
        children: []
      }
    ]
  },
  {
    name: 'item 5',
    children: []
  }
])
</script>

NestedFunction.vue

<template>
  <ul class="drag-area" ref="el">
    <li v-for="el in modelValue" :key="el.name">
      <p>{{ el.name }}</p>
      <nested-function v-model="el.children" />
    </li>
  </ul>
</template>
<script setup lang="ts">
import { useDraggable } from 'vue-draggable-plus'
import { computed, ref } from 'vue'

interface IList {
  name: string
  children: IList[]
}

interface Props {
  modelValue: IList[]
}

const props = defineProps<Props>()
interface Emits {
  (e: 'update:modelValue', value: IList[]): void
}
const emits = defineEmits<Emits>()
const list = computed({
  get: () => props.modelValue,
  set: value => emits('update:modelValue', value)
})

const el = ref()
useDraggable(el, list, {
  group: 'g1'
})
</script>
<style scoped>
.drag-area {
  min-height: 50px;
  outline: 1px dashed;
}
</style>

指令使用

• item 1

  • item 2

• item 3

  • item 4

• item 5

[
  {
    "name": "item 1",
    "children": [
      {
        "name": "item 2",
        "children": []
      }
    ]
  },
  {
    "name": "item 3",
    "children": [
      {
        "name": "item 4",
        "children": []
      }
    ]
  },
  {
    "name": "item 5",
    "children": []
  }
]

传递指令参数实现

复制成功!

<template>
  <div class="flex justify-between">
    <NestedDirective v-model="list" class="w-full"></NestedDirective>
    <preview-list :list="list" />
  </div>
</template>

<script setup lang="ts">
import { ref } from 'vue'
import NestedDirective from './NestedDirective.vue'

const list = ref([
  {
    name: 'item 1',
    children: [
      {
        name: 'item 2',
        children: []
      }
    ]
  },
  {
    name: 'item 3',
    children: [
      {
        name: 'item 4',
        children: []
      }
    ]
  },
  {
    name: 'item 5',
    children: []
  }
])
</script>

NestedDirective.vue

<template>
  <ul v-draggable="[list, { group: 'g1' }]" class="drag-area">
    <li v-for="el in modelValue" :key="el.name">
      <p>{{ el.name }}</p>
      <nested-directive v-model="el.children" />
    </li>
  </ul>
</template>
<script setup lang="ts">
import { vDraggable } from 'vue-draggable-plus'
import { computed } from 'vue'

interface IList {
  name: string
  children: IList[]
}

interface Props {
  modelValue: IList[]
}

const props = defineProps<Props>()
interface Emits {
  (e: 'update:modelValue', value: IList[]): void
}
const emits = defineEmits<Emits>()
const list = computed({
  get: () => props.modelValue,
  set: value => emits('update:modelValue', value)
})
</script>
<style scoped>
.drag-area {
  min-height: 50px;
  outline: 1px dashed;
}
</style>