Detailed explanation of the steps to create a tree menu in Vue-JS Tutorial-php.cn

Detailed explanation of the steps to create a tree menu in Vue

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Release： 2018-05-10 10:41:51

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This time I will bring you a detailed explanation of the steps to create a tree menu with Vue. What are the precautions for creating a tree menu with Vue. Here is a practical case, let’s take a look.

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title>vue</title>
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <link rel="stylesheet" href="animate.css">
 <script src="vue.js"></script>
 <style>
  *{
  color:#585858;
  
  }
  #app{
  min-height: 650px;
  }
  #app li{
  list-style-type:none;
  }
  #app a{
  text-decoration:none;
  }
  #app button{
  width:100%;
  }
  #app ul{
  padding:10px;
  }
  #app span{
  cursor:pointer;
  }
  #tree{
  border: 1px solid #ccc;  
  min-height: 650px;
  width: 50%;
  margin:0;
  padding-top: 10px;
  background-color:#f2f2f2;
  position: absolute;
  top:0;
  left:0;
  }
  
  #tree li {
  display: block;
  padding: 0;
  margin: 0;
  border: 0;
  border-bottom: 1px solid #e5e5e5;
  min-height: 32px;
  line-height:32px;
  }
 </style>
 </head>
 <body>
 <p id=&#39;app&#39; @click=&#39;hideTree($event)&#39;>
  <button @click.stop="show = !show">点我</button>
  
  <transition enter-active-class="animated fadeInLeft" leave-active-class="animated fadeOutLeft">
  <item v-bind:tree=&#39;treeData&#39; id=&#39;tree&#39; v-if="show"></item> 
  </transition> 
 </p>
 <template id=&#39;tree-template&#39;>
  <ul>
  <li v-for=&#39;(v,i) in tree&#39;> 
   <span v-if="isFolder(v)" @click="toggle(i)">{{ tree[i].open ? '-' : '+' }}</span>
   <a data-id="v.id">{{v.city}}</a> 
   <item v-bind:tree=&#39;v.child&#39; v-show="tree[i].open"></item>
  </li>
  </ul> 
 </template>
 <script>
  var data = [{"id":26,"pid":1,"city":"四川省"},{"id":30,"pid":1,"city":"云南省"},{"id":322,"pid":26,"city":"成都"},{"id":323,"pid":26,"city":"绵阳"},{"id":324,"pid":26,"city":"阿坝"},{"id":325,"pid":26,"city":"巴中"},{"id":326,"pid":26,"city":"达州"},{"id":327,"pid":26,"city":"德阳"},{"id":328,"pid":26,"city":"甘孜"},{"id":329,"pid":26,"city":"广安"},{"id":330,"pid":26,"city":"广元"},{"id":331,"pid":26,"city":"乐山"},{"id":332,"pid":26,"city":"凉山"},{"id":333,"pid":26,"city":"眉山"},{"id":334,"pid":26,"city":"南充"},{"id":335,"pid":26,"city":"内江"},{"id":336,"pid":26,"city":"攀枝花"},{"id":337,"pid":26,"city":"遂宁"},{"id":338,"pid":26,"city":"雅安"},{"id":339,"pid":26,"city":"宜宾"},{"id":340,"pid":26,"city":"资阳"},{"id":341,"pid":26,"city":"自贡"},{"id":342,"pid":26,"city":"泸州"},{"id":367,"pid":30,"city":"昆明"},{"id":378,"pid":30,"city":"曲靖"},{"id":3100,"pid":367,"city":"盘龙区"},{"id":3101,"pid":367,"city":"五华区"},{"id":3102,"pid":367,"city":"官渡区"},{"id":3103,"pid":367,"city":"西山区"},{"id":3104,"pid":367,"city":"东川区"},{"id":3105,"pid":367,"city":"安宁市"},{"id":3106,"pid":367,"city":"呈贡县"},{"id":3107,"pid":367,"city":"晋宁县"},{"id":3108,"pid":367,"city":"富民县"},{"id":3109,"pid":367,"city":"宜良县"},{"id":3110,"pid":367,"city":"嵩明县"},{"id":3111,"pid":367,"city":"石林县"},{"id":3112,"pid":367,"city":"禄劝"},{"id":3113,"pid":367,"city":"寻甸"},{"id":3189,"pid":378,"city":"麒麟区"},{"id":3190,"pid":378,"city":"宣威市"},{"id":3191,"pid":378,"city":"马龙县"},{"id":3192,"pid":378,"city":"陆良县"},{"id":3193,"pid":378,"city":"师宗县"},{"id":3194,"pid":378,"city":"罗平县"},{"id":3195,"pid":378,"city":"富源县"},{"id":3196,"pid":378,"city":"会泽县"},{"id":3197,"pid":378,"city":"沾益县"}];
  var treeData = createTree({
  idname:'id',
  pidname:'pid',
  rootid:1,
  data:data
  });
  function createTree(arg){
  var idname = arg.idname,
   pidname = arg.pidname,
   rootid = arg.rootid,
   data = arg.data,
   treeData = [];
  var _createTree = function(id){
   var ret = []; 
   var index = 0;
   for(var i = 0; i < data.length; i++){  
   if(data[i][pidname] == id){
    ret[index] = data[i];
    ret[index].child = _createTree(data[i][idname]);
    index++;
   } 
   }
   return ret;
  }
  var index = 0;
  for(var i = 0; i < data.length; i++){  
   if(data[i][pidname] == rootid){
   treeData[index] = data[i];
   treeData[index].child = _createTree(data[i][idname]);
   index++;
   } 
  }
  return treeData;
  }
  Vue.component(&#39;item&#39;, {
  template: &#39;#tree-template&#39;,
  props: [&#39;tree&#39;],
  data: function () {
   return {}
  },
  methods: {
   toggle: function (i) {
   this.tree[i].open = !this.tree[i].open;
   this.$set(this.tree, i, this.tree[i]);
   },
   isFolder: function (data) {
   return data.child && data.child.length
   },
  },
  })
  var vm = new Vue({
  el: &#39;#app&#39;,
  data: {
   treeData: treeData,
   show:false,
  },
  methods: {
   hideTree:function(e){
   if(e.target.id == &#39;app&#39;){
    console.log(137);
    this.show = false;
   }
   }
  },
  created: function () {
   function _addOpen(data) {
   for (var i = 0; i < data.length; i++) {
    data[i][&#39;open&#39;] = false;
    if (data[i].child.length > 0) {
    _addOpen(data[i].child);
    }
   }
   }
   _addOpen(this.treeData);
  }
  });
 </script>
 </body>
</html>

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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!