使用Vue实现一个树组件的示例
HTML代码：
<!DOCTYPE html><html><head> <title>Vue Demo</title> <meta charset='utf-8' /> <meta http-equiv='X-UA-Compatible' content='IE=edge'> <meta name='viewport' content='width=device-width, initial-scale=1'> <style type='text/css'> /* span样式 */ .treeviewitem-span { font-size: 14px; } /* 箭头样式 */ .treeviewitem-arrow-icon { margin-top: 3px; margin-left: 3px; margin-right: 3px; float: left; width: 0; height: 0; border-top-width: 6px; border-right-width: 0px; border-bottom-width: 6px; border-left-width: 6px; border-style: solid; border-color: transparent transparent transparent #666666; transform: rotate(0deg); } /* 90度旋转箭头样式 */ .treeviewitem-arrow-icon90 { margin-top: 3px; margin-left: 3px; margin-right: 3px; float: left; width: 0; height: 0; border-top-width: 6px; border-right-width: 0px; border-bottom-width: 6px; border-left-width: 6px; border-style: solid; border-color: transparent transparent transparent #666666; transform: rotate(90deg); } /* 模板隐藏 */ template { display: none; } </style> <script type='text/javascript' src='https://www.haobala.com/bcjs/vue.js'></script> <script type='text/javascript'> </script></head><body> <!-- treeviewitem模板 --> <template id='treeviewitem'> <div> <div style='background-color:transparent; cursor:default; height:25px;'><div v-on:click='expand' style='width:16px; height:16px; float:left; background-color:transparent;'><span v-bind: v-if='isLeaf'></span></div><input type='checkbox' v-on:click='checkboxClick' v-model='self.selected' /><span v-on:click='itemClick' class='treeviewitem-span'>{{ self.name }}</span></div> <div v-if='self.expand' v-for='item in items' style='margin-left:20px;'><treeviewitem v-bind:items='item.items' v-bind:self='item'></treeviewitem> </div> </div> </template> <!-- treeview模板 --> <template id='treeview'> <div> <div v-for='item in items'><treeviewitem v-bind:items='item.items' v-bind:self='item'></treeviewitem> </div> </div> </template> <div id='app'> <!-- 使用treeview组件 --> <treeview v-bind:items='items'></treeview> <br /> <button onclick='showSelectedResult()'>勾选结果</button> </div> <script type='text/javascript'> //定义treeviewitem组件 Vue.component(’treeviewitem’, { props: [’items’, ’self’], template: ’#treeviewitem’, methods: {itemClick: function (d) { alert('您单击了节点：' + this.self.name);},checkboxClick: function (e) { var checkChild; checkChild = function (items, checked) { for (var i = 0; i < items.length; i++) { var item = items[i]; item.selected = checked; if (item.items) {checkChild(item.items, checked) } } }; if (e.target.checked) { checkChild(this.items, true); } else { checkChild(this.items, false); }},expand: function (e) { if (this.self.expand) { this.self.expand = false; } else { this.self.expand = true; }} }, computed: {isLeaf: function () { if (this.items && this.items.length > 0) { return true; } return false;} } }); //定义treeview组件 Vue.component(’treeview’, { props: [’items’], template: ’#treeview’ }); //定义vm var vm = new Vue({ el: ’#app’, methods: {/** * @description 获取勾选结果 */getSelected: function (items) { if (!items) items = this.items; var result = []; for (var i = 0; i < items.length; i++) { var item = items[i]; if (item.selected) { result.push(item.name); } if (item.items) { var childSelected = this.getSelected(item.items); for (var k = 0; k < childSelected.length; k++) {result.push(childSelected[k]); } } } return result;} }, data: {items: [ { name: ’条目1’, expand: true, selected: false, items: [ {name: ’条目11’,expand: true,selected: false,items: [ { name: ’条目111’, expand: true, selected: true, }] }, {name: ’条目12’,expand: false,selected: false,items: [ { name: ’条目121’, expand: true, selected: false, }, { name: ’条目122’, expand: true, selected: false, items: [ {name: ’条目1221’,expand: true,selected: false }, {name: ’条目1222’,expand: true,selected: false } ] }] }, {name: ’条目13’,expand: true,selected: false } ] }, { name: ’条目2’, expand: true, selected: false }, { name: ’条目3’, expand: true, selected: false, items: [ {name: '条目31',expand: true,selected: false } ] }] } }) //显示勾选结果 function showSelectedResult() { var selected = vm.getSelected(); alert('您勾选了：' + selected.join(’, ’)); } </script></body></html>
效果图：
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