How to use vue file tree component

This time I will show you how to use the vue file tree component. What are the precautions when using the vue file tree component. The following is a practical case, let's take a look.

First is the html template:

<li>
  <p
   //文件夹加粗表示
   :class="{bold: isFolder}" 
   //处理单击事件 打开闭合文件列表            
   @click="toggle"  
   //处理双击事件 双击子文件，子文件属性变为文件夹               
   @dblclick="changeType">  
   //显示文件名      
   {{model.name}}
  //若是文件夹的话则显示[+]来控制文件夹的开关闭合
   <span v-if="isFolder">[{{open ? '-' : '+'}}]</span>
  </p>
  <ul v-show="open" v-if="isFolder">
  //利用v-for显示子文件列表，通过递归使用item组件来完成文件树
   <item
   class="item"
   v-for="model in model.children"
   :model="model">
   </item>
   //增加一个+标记，单击可以增加子文件
   <li class="add" @click="addChild">+</li>
  </ul>
</li>

Next is the source code of the component part:

Vue.component('item', {
 template: '#item-template',
 props: {
 model: Object //将文件数据通过props传入
 },
 data: function () {
 return {
  open: false  //open表示文件夹闭合状态
 }
 },
 computed: {
 isFolder: function () {
  return this.model.children &&
  this.model.children.length
 }
 }, //计算对象是否有子节点并且子节点数大于0来判断是否是文件夹
 methods: {
 toggle: function () {
  if (this.isFolder) {
  this.open = !this.open
  }
 },    //控制文件夹闭合的方法 单击触发改变open
 changeType: function () {
  if (!this.isFolder) {
  Vue.set(this.model, 'children', [])
  this.addChild()
  this.open = true
  }
 }, //双击触发，通过给文件增加子节点来使文件属性变成文件夹
 addChild: function () {
  this.model.children.push({
  name: 'new stuff'
  })  //点击文件夹里的+节点触发 为文件夹添加一个新文件
 }   
 }
})

So the design idea is to determine whether the object has child nodes to determine whether it is a folder or file, and then recursively reuse the component to display the effect of the file tree.

The last is the data format of the incoming component:

var data = {
 name: 'My Tree',
 children: [
 { name: 'hello' },
 { name: 'wat' },
 {
  name: 'child folder',
  children: [
  {
   name: 'child folder',
   children: [
   { name: 'hello' },
   { name: 'wat' }
   ]
  },
  { name: 'hello' },
  { name: 'wat' },
  {
   name: 'child folder',
   children: [
   { name: 'hello' },
   { name: 'wat' }
   ]
  }
  ]
 }
 ]
}

You can continue to expand the function and display effect of the file tree based on this basic structure.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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