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这篇文章给大家介绍Vue2中怎么实现一个无限级分类，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Vue 树</title>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<style type="text/css">
a{color: #333; text-decoration: none;}
ul{padding-left: 15px;}
</style>
</head>
<body>
<div id="app">
{{items}}
<treelist v-for="(val, index) in items" :item="val" @remove="delItem(index)"></treelist>
</div>
<template id="treelist-template">
<ul>
<div >
<a v-if="isFolder" @click="toggle()">[{{open ? '-' : '+'}}]</a>
<a v-else >[+]</a>
<input type="number" v-model="item.sort">
<input type="text" size="30" v-model="item.name" placeholder="岗位名称">
<button type="button" @click="addChild()">添加</button>
<button type="button" @click="$emit('remove')" v-if="!isFolder">删除</button>
</div>
<ul v-show="open" v-if="isFolder">
<treelist v-for="(val, index) in item.children" :item="val" @remove="delItem(index)"></treelist>
</ul>
</ul>
</template>
<script>
window.onload = function(){
//treelist组件
Vue.component('treelist', {
template: '#treelist-template',
props: {
item: Object
},
data: function() {
return {
open: false
}
},
computed: {
isFolder: function() {
return this.item.children && this.item.children.length
}
},
methods: {
toggle: function() {
if (this.isFolder) {
this.open = !this.open
}
},
addChild: function() {
/*添加内容但不同步到服务器*/
if (!this.isFolder) {
Vue.set(this.item, 'children', [])
}
this.open = true
this.item.children.push({
sort: 0,
name: '',
status: 1,
parent_id: this.item['id']
})
},
delItem: function(index){
this.item['children'].splice(index, 1)
}
}
})
new Vue({
el: '#app',
data:{
mydata: {},
items: [
{"id":"10","parent_id":"0","sort":"0","name":"其它","status":"0"},
{"id":"12","parent_id":"0","sort":"0","name":"测试","status":"0"},
{"id":"1","parent_id":"0","sort":"0","name":"水果","status":"0",
"children":[
{"id":"4","parent_id":"1","sort":"0","name":"香蕉","status":"0"}
]
},
{"id":"2","parent_id":"0","sort":"0","name":"饮料","status":"0",
"children":[
{"id":"5","parent_id":"2","sort":"0","name":"可乐","status":"0"},
{"id":"6","parent_id":"2","sort":"0","name":"酒水","status":"0",
"children":[
{"id":"7","parent_id":"6","sort":"0","name":"啤酒","status":"0"}
]
}
]
},
{"id":"3","parent_id":"0","sort":"0","name":"美食","status":"0",
"children":[
{"id":"8","parent_id":"3","sort":"0","name":"红烧鱼","status":"0"}
]
}
]
},
methods: {
add:function(){
this.mydata['id'] = 100;//从服务器返回的ID号
this.mydata['status'] = 0;
this.mydata['parent_id'] = 0;
this.items.push(this.mydata);
this.mydata = {};
},
delItem: function(index){
this.items.splice(index, 1)
}
}
});
}
</script>
</body>
</html>
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