How to implement tree menu in vue-JS Tutorial-php.cn

How to implement tree menu in vue
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Release： 2018-03-19 14:05:00
Original
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<!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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