Heim > Artikel > Web-Frontend > Beispielcode für eine baumförmige Schüssel, implementiert von Vue
In diesem Artikel wird hauptsächlich das von vue implementierte Baummenü vorgestellt.
Der folgende Code stellt die von vue implementierte Baummenüfunktion vor. Der spezifische Code lautet wie folgt:
<!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='app' @click='hideTree($event)'> <button @click.stop="show = !show">点我</button> <transition enter-active-class="animated fadeInLeft" leave-active-class="animated fadeOutLeft"> <item v-bind:tree='treeData' id='tree' v-if="show"></item> </transition> </p> <template id='tree-template'> <ul> <li v-for='(v,i) in tree'> <span v-if="isFolder(v)" @click="toggle(i)">{{ tree[i].open ? '-' : '+' }}</span> <a data-id="v.id">{{v.city}}</a> <item v-bind:tree='v.child' 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('item', { template: '#tree-template', props: ['tree'], 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: '#app', data: { treeData: treeData, show:false, }, methods: { hideTree:function(e){ if(e.target.id == 'app'){ console.log(137); this.show = false; } } }, created: function () { function _addOpen(data) { for (var i = 0; i < data.length; i++) { data[i]['open'] = false; if (data[i].child.length > 0) { _addOpen(data[i].child); } } } _addOpen(this.treeData); } }); </script> </body> </html>
Das Obige habe ich für Sie zusammengestellt. Ich hoffe, es wird Ihnen in Zukunft hilfreich sein.
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