一、主要运用element封装的控件并封装成组件运用，如图所示
父组件代码如图所示：
下面是子组件的代码：
<template>
<ul class="l_tree">
<li class="l_tree_branch" v-for="item in model" :key="item.id">
<div class="l_tree_click">
<button type="button" class="l_tree_children_btn" v-if="item.children" @click="toggle(item)">{{ !item.show ? '-' : '+' }}</button>
<span class="l_folder" @click="clickSize(item.id)" :class="current === item.id ? 'current' : 'currentSize'">{{ item.name }}</span>
</div>
<ew-tree
v-show="!item.show"
:model="item.children"
:current="current"
@change="changeCurrent"></ew-tree>
</li>
</ul>
</template>
<script>
export default {
name: 'EwTree',
props: {
model: {
type: Array,
default() {
return []
}
},
current: {
type: String,
default: ''
}
},
methods: {
toggle(item) {
console.log(item)
var idx = this.model.indexOf(item)
this.$set(this.model[idx], 'show', !item.show)
},
clickSize(id) {
console.log(1, id)
this.$emit('change', id)
},
changeCurrent(id) {
this.clickSize(id)
}
},
mounted() {
}
}
</script>
<style lang="less" scoped>
*{
box-sizing: border-box;
margin: 0;padding: 0;
}
*:before,*:after{
box-sizing: border-box;
}
ul,
li {
list-style: none;
}
.current{
color: #e9c309 !important
}
.l_tree_container {
width: 100%;
height: 100%;
box-shadow: 0 0 3px #ccc;
margin: 13px;
position: relative;
}
.l_tree {
width: calc(100%);
padding-left: 15px;
}
.l_tree_branch {
width: 100%;
height: 100%;
display: block;
padding: 13px;
position: relative;
}
.l_tree_branch .l_tree_children_btn {
width: 12px;
height: 12px;
background-color: #515a68;
font-size: 8px;
text-align: center;
color: #bbbec1;
outline: none;
border: 0;
cursor: pointer;
border: 1px solid #bbbec1;
line-height: 11px;
margin-left: 5px;
}
ul.l_tree:before {
content: '';
border-left: 1px dashed #999999;
height: calc(100% - 24px);
position: absolute;
left: 10px;
top: 0px;
}
.l_tree,
.l_tree_branch {
position: relative;
}
.l_tree_branch::after {
content: '';
width: 18px;
height: 0;
border-bottom: 1px dashed #bbbec1;
position: absolute;
right: calc(100% - 10px);
top: 24px;
left: -5px;
}
.l_tree_container>.l_tree::before,
.l_tree_container>.l_tree>.l_tree_branch::after {
display: none;
}
.l_folder {
font-size:11px;
margin-left: 5px;
display: inline;
color: #bbbec1;
cursor: pointer;
}
</style>
主要难点是：current传值问题，所以current绑定在父组件
父组件中的值和方法：
当然在运行npm时是需要安装npm install ewtree -S,实现组件化
最终效果如下：
全部点开的时候，样式中线还是有点问题，希望大神帮忙优化一下