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Example code of tree-shaped dish implemented by vue

亚连Original: 2018-05-29 15:16:541485browse

This article mainly introduces the tree menu implemented by vue. Friends who need it can refer to it

The following code introduces the tree menu function implemented by vue. The specific code is as follows:

<!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" rel="external nofollow" >
    <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 ? &#39;-&#39; : &#39;+&#39; }}</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:&#39;id&#39;,
        pidname:&#39;pid&#39;,
        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>

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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