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

php中世界最好的语言Original: 2018-05-10 10:41:512079browse

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>

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!

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

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