我们先写个tree组件 递归组件
tree.vue文件
<template>
<ul class="ul-wrapper">
<!-- 包裹层-->
<li v-for="item in list" :key="item.key">
<!-- 遍历-->
<div>
<!-- 是否展开图标-->
<img class="icon" v-show="item.children" @click="changeShow" />
<!-- CheckBox-->
<!-- <input type="checkbox" :name="item.key" @click="clickbox" :checked="isChecked(item.key)" :disabled="item.disabled" /> -->
<div class="checkbox-title">{{ item.title }}</div>
<!-- CheckBox内容-->
</div>
<tree v-if="showChildren" :list="item.children"></tree>
<!-- 遍历children-->
</li>
</ul>
</template>
<script type="text/ecmascript-6">
export default {
name: ‘tree‘,
props: {
list: { // 所有树节点
type: Array,
default: () => {
return []
}
}
},
data () {
return {
showChildren: true // 是否展开根目录
}
},
computed: { // computed属性计算展开图标
imgUrl () {
return this.showChildren ? ‘down.png‘ : ‘right.png‘
}
},
methods: {
clickbox (e) { // 点击CheckBox时需要加入或删除已选中this.$global.nodes的节点数组中
const checked = e.target.checked
const key = e.target.name
const nodes = this.$global.nodes // this.$global.nodes是全局变量，便于递归组件记录选中节点
if (checked) {
if (!nodes.includes(key)) {
this.$global.nodes.push(key)
}
} else {
this.$global.nodes = nodes.filter((item) => {
return key !== item
})
}
},
changeShow () { // 点击是否展开根目录，当前状态取反即可
this.showChildren = !this.showChildren
},
isChecked (key) { // 查看是否已经存在于选中节点中
return this.$global.nodes.includes(key)
}
}
}
</script>
<style lang="stylus">
.ul-wrapper
margin 10px 30px 0
.checkbox-title, .icon
display inline-block
vertical-align middle
.icon
margin-left -20px
height 18px
width 18px
input[type="checkbox"]
position relative
display inline-block
vertical-align middle
padding 0
margin-right 5px
height 18px
width 18px
border 1px solid #ccc
border-radius 3px
input[type="checkbox"]:checked::before
position absolute
top 0
left 0
padding-left 2px
content: "\2713";
height 15px
width 13px
font-size 12px
font-weight: bold;
background #1296db
color #fff
border-radius 3px
border 0
input[type="checkbox"]:disabled::before // CheckBox禁用状态时样式修改
position absolute
top 0
left 0
padding-left 2px
content: "";
height 15px
width 13px
font-size 12px
font-weight: bold;
background #ccc
color #fff
border-radius 3px
border 0
</style>
home.vue 引入tree组件
<template>
<Tree :list="treeData"></Tree>
</template>
<script lang="ts">
import { defineComponent } from ‘vue‘
import Tree from ‘@/components/tree.vue‘
export default defineComponent({
name: ‘home‘,
components: {
Tree
},
setup() {
const treeData = [
{
title: ‘1‘,
key: ‘1‘,
children: [
{
title: ‘1-1‘,
key: ‘1-1‘,
children: [
{ title: ‘1-1-1‘, key: ‘1-1-1‘ },
{ title: ‘1-1-2‘, key: ‘1-1-2‘ },
{ title: ‘1-1-3‘, key: ‘1-1-3‘ }
]
},
{
title: ‘1-2‘,
key: ‘1-2‘,
children: [
{ title: ‘1-2-1‘, key: ‘1-2-1‘ },
{ title: ‘1-2-2‘, key: ‘1-2-2‘ },
{ title: ‘1-2-3‘, key: ‘1-2-3‘ }
]
},
{
title: ‘1-3‘,
key: ‘1-3‘
}
]
},
{
title: ‘2‘,
key: ‘2‘,
disabled: ‘true‘,
children: [
{ title: ‘2-1‘, key: ‘2-1‘ },
{ title: ‘2-2‘, key: ‘2-2‘ },
{ title: ‘2-3‘, key: ‘2-3‘ }
]
},
{
title: ‘3‘,
key: ‘3‘
}
]
return {
treeData
}
}
})
</script>