后端返回了50万数据，让前端一次性展示成树，之前用的ant-design-vue的tree插件，卡的死死的，经过大量实验，现发现三种树可以支持如此大数量的数据。

目录

第一种：vue-easy-tree

使用方式：

1.安装插件

2.引入插件

全局引入

组件引入

3.使用

在使用虚拟滚动时，必须设置node-key。

4.api（githup经常打不开，哎,复制了一下大家一起看）

基础用法

可选择

懒加载自定义叶子节点

默认展开和默认选中

禁用状态

树节点的选择

自定义节点内容

节点过滤

手风琴模式

可拖拽节点

Attributes

props

方法

Events

Scoped Slot

第二种：zTree(vue-giant-tree)延迟加载

1.安装插件

2.页面使用

第三种：vxe-table-plugin-virtual-tree

总结

第一种：vue-easy-tree

• 大数据量支持虚拟滚动
• 基本树形数据的展示
• 支持checkbox选择
• 支持懒加载
• 默认展开和默认选中
• 禁用节点
• 通过多种方式选中节点和获取选中的节点信息
• 支持自定义节点内容
• 支持节点过滤
• 非虚拟滚动下，支持手风琴模式
• 非懒加载时，支持节点拖拽

githup上有详细api介绍

https://github.com/wchbrad/vue-easy-tree/blob/aa225219e4dc9e88f0a633405fe3947991dfd224/element-ui-tree.zh-CN.md

使用方式：

1.安装插件

npm install @wchbrad/vue-easy-tree

2.引入插件

全局引入

在main.js文件中引入：

import Vue from "vue";import VueEasyTree from "@wchbrad/vue-easy-tree";// 样式文件，可以根据需要自定义样式或主题import "@wchbrad/vue-easy-tree/src/assets/index.scss"Vue.use(VueEasyTree)

组件引入

在组件中引入：

import VueEasyTree from "@wchbrad/vue-easy-tree";// 样式文件，可以根据需要自定义样式或主题import "@wchbrad/vue-easy-tree/src/assets/index.scss"export default {components: {VueEasyTree}}

3.使用

在使用虚拟滚动时，必须设置node-key。

4.api（githup经常打不开，哎,复制了一下大家一起看）

基础用法

基础的树形结构展示。

export default {data() {return {data: [{label: '一级 1',children: [{label: '二级 1-1',children: [{label: '三级 1-1-1'}]}]}, {label: '一级 2',children: [{label: '二级 2-1',children: [{label: '三级 2-1-1'}]}, {label: '二级 2-2',children: [{label: '三级 2-2-1'}]}]}, {label: '一级 3',children: [{label: '二级 3-1',children: [{label: '三级 3-1-1'}]}, {label: '二级 3-2',children: [{label: '三级 3-2-1'}]}]}],defaultProps: {children: 'children',label: 'label'}};},methods: {handleNodeClick(data) {console.log(data);}}};

可选择

适用于需要选择层级时使用。

本例还展示了动态加载节点数据的方法。

export default {data() {return {props: {label: 'name',children: 'zones'},count: 1};},methods: {handleCheckChange(data, checked, indeterminate) {console.log(data, checked, indeterminate);},handleNodeClick(data) {console.log(data);},loadNode(node, resolve) {if (node.level === 0) {return resolve([{ name: 'region1' }, { name: 'region2' }]);}if (node.level > 3) return resolve([]);var hasChild;if (node.data.name === 'region1') {hasChild = true;} else if (node.data.name === 'region2') {hasChild = false;} else {hasChild = Math.random() > 0.5;}setTimeout(() => {var data;if (hasChild) {data = [{name: 'zone' + this.count++}, {name: 'zone' + this.count++}];} else {data = [];}resolve(data);}, 500);}}};

懒加载自定义叶子节点

由于在点击节点时才进行该层数据的获取，默认情况下 Tree 无法预知某个节点是否为叶子节点，所以会为每个节点添加一个下拉按钮，如果节点没有下层数据，则点击后下拉按钮会消失。同时，你也可以提前告知 Tree 某个节点是否为叶子节点，从而避免在叶子节点前渲染下拉按钮。

export default {data() {return {props: {label: 'name',children: 'zones',isLeaf: 'leaf'},};},methods: {loadNode(node, resolve) {if (node.level === 0) {return resolve([{ name: 'region' }]);}if (node.level > 1) return resolve([]);setTimeout(() => {const data = [{name: 'leaf',leaf: true}, {name: 'zone'}];resolve(data);}, 500);}}};

默认展开和默认选中

可将 Tree 的某些节点设置为默认展开或默认选中

分别通过default-expanded-keys和default-checked-keys设置默认展开和默认选中的节点。需要注意的是，此时必须设置node-key，其值为节点数据中的一个字段名，该字段在整棵树中是唯一的。

export default {data() {return {data: [{id: 1,label: '一级 1',children: [{id: 4,label: '二级 1-1',children: [{id: 9,label: '三级 1-1-1'}, {id: 10,label: '三级 1-1-2'}]}]}, {id: 2,label: '一级 2',children: [{id: 5,label: '二级 2-1'}, {id: 6,label: '二级 2-2'}]}, {id: 3,label: '一级 3',children: [{id: 7,label: '二级 3-1'}, {id: 8,label: '二级 3-2'}]}],defaultProps: {children: 'children',label: 'label'}};}};

禁用状态

可将 Tree 的某些节点设置为禁用状态

通过disabled设置禁用状态。

export default {data() {return {data: [{id: 1,label: '一级 2',children: [{id: 3,label: '二级 2-1',children: [{id: 4,label: '三级 3-1-1'}, {id: 5,label: '三级 3-1-2',disabled: true}]}, {id: 2,label: '二级 2-2',disabled: true,children: [{id: 6,label: '三级 3-2-1'}, {id: 7,label: '三级 3-2-2',disabled: true}]}]}],defaultProps: {children: 'children',label: 'label'}};}};

树节点的选择

本例展示如何获取和设置选中节点。获取和设置各有两种方式：通过 node 或通过 key。如果需要通过 key 来获取或设置，则必须设置node-key。

通过 node 获取通过 key 获取通过 node 设置通过 key 设置清空export default {methods: {getCheckedNodes() {console.log(this.$refs.tree.getCheckedNodes());},getCheckedKeys() {console.log(this.$refs.tree.getCheckedKeys());},setCheckedNodes() {this.$refs.tree.setCheckedNodes([{id: 5,label: '二级 2-1'}, {id: 9,label: '三级 1-1-1'}]);},setCheckedKeys() {this.$refs.tree.setCheckedKeys([3]);},resetChecked() {this.$refs.tree.setCheckedKeys([]);}},data() {return {data: [{id: 1,label: '一级 1',children: [{id: 4,label: '二级 1-1',children: [{id: 9,label: '三级 1-1-1'}, {id: 10,label: '三级 1-1-2'}]}]}, {id: 2,label: '一级 2',children: [{id: 5,label: '二级 2-1'}, {id: 6,label: '二级 2-2'}]}, {id: 3,label: '一级 3',children: [{id: 7,label: '二级 3-1'}, {id: 8,label: '二级 3-2'}]}],defaultProps: {children: 'children',label: 'label'}};}};

自定义节点内容

节点的内容支持自定义，可以在节点区添加按钮或图标等内容

可以通过两种方法进行树节点内容的自定义：render-content和 scoped slot。使用render-content指定渲染函数，该函数返回需要的节点区内容即可。渲染函数的用法请参考 Vue 文档。使用 scoped slot 会传入两个参数node和data，分别表示当前节点的 Node 对象和当前节点的数据。注意：由于 jsfiddle 不支持 JSX 语法，所以render-content示例在 jsfiddle 中无法运行。但是在实际的项目中，只要正确地配置了相关依赖，就可以正常运行。

使用 render-content
使用 scoped slot
{{ node.label }} append(data)">Append remove(node, data)">Deletelet id = 1000;export default {data() {const data = [{id: 1,label: '一级 1',children: [{id: 4,label: '二级 1-1',children: [{id: 9,label: '三级 1-1-1'}, {id: 10,label: '三级 1-1-2'}]}]}, {id: 2,label: '一级 2',children: [{id: 5,label: '二级 2-1'}, {id: 6,label: '二级 2-2'}]}, {id: 3,label: '一级 3',children: [{id: 7,label: '二级 3-1'}, {id: 8,label: '二级 3-2'}]}];return {data: JSON.parse(JSON.stringify(data)),data: JSON.parse(JSON.stringify(data))}},methods: {append(data) {const newChild = { id: id++, label: 'testtest', children: [] };if (!data.children) {this.$set(data, 'children', []);}data.children.push(newChild);},remove(node, data) {const parent = node.parent;const children = parent.data.children || parent.data;const index = children.findIndex(d => d.id === data.id);children.splice(index, 1);},renderContent(h, { node, data, store }) {return ({node.label} this.append(data) }>Append this.remove(node, data) }>Delete);}}};.custom-tree-node {flex: 1;display: flex;align-items: center;justify-content: space-between;font-size: 14px;padding-right: 8px;}

节点过滤

通过关键字过滤树节点

在需要对节点进行过滤时，调用 Tree 实例的filter方法，参数为关键字。需要注意的是，此时需要设置filter-node-method，值为过滤函数。

export default {watch: {filterText(val) {this.$refs.tree.filter(val);}},methods: {filterNode(value, data) {if (!value) return true;return data.label.indexOf(value) !== -1;}},data() {return {filterText: '',data: [{id: 1,label: '一级 1',children: [{id: 4,label: '二级 1-1',children: [{id: 9,label: '三级 1-1-1'}, {id: 10,label: '三级 1-1-2'}]}]}, {id: 2,label: '一级 2',children: [{id: 5,label: '二级 2-1'}, {id: 6,label: '二级 2-2'}]}, {id: 3,label: '一级 3',children: [{id: 7,label: '二级 3-1'}, {id: 8,label: '二级 3-2'}]}],defaultProps: {children: 'children',label: 'label'}};}};

手风琴模式

对于同一级的节点，每次只能展开一个

export default {data() {return {data: [{label: '一级 1',children: [{label: '二级 1-1',children: [{label: '三级 1-1-1'}]}]}, {label: '一级 2',children: [{label: '二级 2-1',children: [{label: '三级 2-1-1'}]}, {label: '二级 2-2',children: [{label: '三级 2-2-1'}]}]}, {label: '一级 3',children: [{label: '二级 3-1',children: [{label: '三级 3-1-1'}]}, {label: '二级 3-2',children: [{label: '三级 3-2-1'}]}]}],defaultProps: {children: 'children',label: 'label'}};},methods: {handleNodeClick(data) {console.log(data);}}};

可拖拽节点

通过 draggable 属性可让节点变为可拖拽。

export default {data() {return {data: [{id: 1,label: '一级 1',children: [{id: 4,label: '二级 1-1',children: [{id: 9,label: '三级 1-1-1'}, {id: 10,label: '三级 1-1-2'}]}]}, {id: 2,label: '一级 2',children: [{id: 5,label: '二级 2-1'}, {id: 6,label: '二级 2-2'}]}, {id: 3,label: '一级 3',children: [{id: 7,label: '二级 3-1'}, {id: 8,label: '二级 3-2',children: [{ id: 11,label: '三级 3-2-1'}, {id: 12,label: '三级 3-2-2'}, {id: 13,label: '三级 3-2-3'}]}]}],defaultProps: {children: 'children',label: 'label'}};},methods: {handleDragStart(node, ev) {console.log('drag start', node);},handleDragEnter(draggingNode, dropNode, ev) {console.log('tree drag enter: ', dropNode.label);},handleDragLeave(draggingNode, dropNode, ev) {console.log('tree drag leave: ', dropNode.label);},handleDragOver(draggingNode, dropNode, ev) {console.log('tree drag over: ', dropNode.label);},handleDragEnd(draggingNode, dropNode, dropType, ev) {console.log('tree drag end: ', dropNode && dropNode.label, dropType);},handleDrop(draggingNode, dropNode, dropType, ev) {console.log('tree drop: ', dropNode.label, dropType);},allowDrop(draggingNode, dropNode, type) {if (dropNode.data.label === '二级 3-1') {return type !== 'inner';} else {return true;}},allowDrag(draggingNode) {return draggingNode.data.label.indexOf('三级 3-2-2') === -1;}}};

Attributes

props

方法

Tree内部使用了 Node 类型的对象来包装用户传入的数据，用来保存目前节点的状态。Tree拥有如下方法：

Events

Scoped Slot

第二种：zTree(vue-giant-tree)延迟加载

巨树：基于ztree封装的 Vue 树形组件，轻松实现海量数据的高性能渲染。

Vue 的数据监听机制决定了在大数据量场景下的渲染性能非常低下，基于 Vue 实现的常规树组件几乎无法胜任上万条数据的高性能渲染，在 IE 浏览器（即便是 IE11）中很容易导致页面卡死甚至浏览器崩溃。

为了摆脱数据监听，只能放弃通过 Vue 渲染，采用常规 DOM 操作的方式。在这个领域ztree是当之无愧最成熟的方案，因此 vue-giant-tree 直接基于 ztree 做上层封装，以组件的形式将 ztree 的配置和事件暴露出来，使其可以方便的在 Vue 项目中安装使用。

vue-giant-tree 仅仅是给 ztree 套了一层 Vue 组件的壳，顺便提供了一套更现代化的皮肤，因为主打大数据量场景，所以取名巨树。

针对树节点很多，但是每级节点数据不多的情况造成的总数据量大，速度很快。但针对每个节点数据很多，但总节点不多的大量数据情况无效。（比如现在数据是1x 20 x 10 x 25 x 100 五个层级，每个层级最大只有100符合，如果是1x 25x 20000 ,一个节点有2万数据，优化不明显），前端书写的时候都是dom操作，还是有些麻烦的

githup链接：https://github.com/tower1229/Vue-Giant-Tree

zTree的api文档链接：Demo [zTree — jQuery tree plug-ins.]

1.安装插件

npm i vue-giant-tree --save

注意：组件依赖 jQuery，务必在页面中提前加载 jQuery，

2.页面使用

zTree组件页面代码

require("@ztree/ztree_v3/js/jquery.ztree.all");export default {props: {setting: {type: Object,require: false,default: function () {return {};},},nodes: {type: Array,require: true,default: function () {return [];},},},data() {return {ztreeId: "ztree_" + parseInt(Math.random() * 1e10),ztreeObj: null,list: [],ztreeSetting: {view: {showIcon: false, // default to hide icon},callback: {onAsyncError: (...arg) => {this.$emit("onAsyncError", ...arg);},onAsyncSuccess: (...arg) => {this.$emit("onAsyncSuccess", ...arg);},onCheck: (...arg) => {this.$emit("onCheck", ...arg);},onClick: (...arg) => {this.$emit("onClick", ...arg);},onCollapse: (...arg) => {this.$emit("onCollapse", ...arg);},onDblClick: (...arg) => {this.$emit("onDblClick", ...arg);},onDrag: (...arg) => {this.$emit("onDrag", ...arg);},onDragMove: (...arg) => {this.$emit("onDragMove", ...arg);},onDrop: (...arg) => {this.$emit("onDrop", ...arg);},onExpand: (...arg) => {this.$emit("onExpand", ...arg);},onMouseDown: (...arg) => {this.$emit("onMouseDown", ...arg);},onMouseUp: (...arg) => {this.$emit("onMouseUp", ...arg);},onRemove: (...arg) => {this.$emit("onRemove", ...arg);},onRename: (...arg) => {this.$emit("onRename", ...arg);},onRightClick: (...arg) => {this.$emit("onRightClick", ...arg);},},},};},watch: {nodes: {handler: function (nodes) {this.list = nodes;// update treeif (this.ztreeObj) {this.ztreeObj.destroy();}this.$nextTick(() => {this.ztreeObj = $.fn.zTree.init($("#" + this.ztreeId),Object.assign({}, this.ztreeSetting, this.setting),this.list);this.$emit("onCreated", this.ztreeObj);});},deep: true,immediate: true,},},};/* beauty ztree! */.ztree {text-align: left;font-size: 14px;}.vue-giant-tree li {list-style-type: none;white-space: nowrap;outline: none;}.vue-giant-tree li ul {position: relative;padding: 0 0 0 20px;margin: 0;}.vue-giant-tree .line:before {position: absolute;top: 0;left: 10px;height: 100%;content: "";border-right: 1px dotted #dbdbdb;}.vue-giant-tree .roots_docu:before,.vue-giant-tree .roots_docu:after,.vue-giant-tree .center_docu:before,.vue-giant-tree .bottom_docu:before,.vue-giant-tree .center_docu:after,.vue-giant-tree .bottom_docu:after {position: absolute;content: "";border: 0 dotted #dbdbdb;}.vue-giant-tree .roots_docu:before {left: 10px;height: 50%;top: 50%;border-left-width: 1px;}.vue-giant-tree .roots_docu:after {top: 50%;left: 11px;width: 50%;border-top-width: 1px;}.vue-giant-tree .center_docu:before {left: 10px;height: 100%;border-left-width: 1px;}.vue-giant-tree .center_docu:after {top: 50%;left: 11px;width: 50%;border-top-width: 1px;}.vue-giant-tree .bottom_docu:before {left: 10px;height: 50%;border-left-width: 1px;}.vue-giant-tree .bottom_docu:after {top: 50%;left: 11px;width: 50%;border-top-width: 1px;}.vue-giant-tree li a {display: inline-block;line-height: 22px;height: 22px;margin: 0;cursor: pointer;transition: none;vertical-align: middle;color: #555555;}.vue-giant-tree .node_name {display: inline-block;padding: 0 3px;border-radius: 4px;}.vue-giant-tree .curSelectedNode .node_name {color: #000;background-color: #c9e9f7;}.vue-giant-tree .curSelectedNode_Edit {height: 20px;opacity: 0.8;color: #000;border: 1px #6cc2e8 solid;background-color: #9dd6f0;}.vue-giant-tree .tmpTargetNode_inner {opacity: 0.8;color: #fff;background-color: #4fcbf0;filter: alpha(opacity=80);}.vue-giant-tree .rename {font-size: 12px;line-height: 22px;width: 80px;height: 22px;margin: 0;padding: 0;vertical-align: top;border: 0;background: none;}.vue-giant-tree .button {position: relative;display: inline-block;line-height: 22px;height: 22px;width: 22px;cursor: pointer;text-align: center;vertical-align: middle;}.vue-giant-tree .button.edit {color: #25ae88;}.vue-giant-tree .button.remove {color: #cb4042;}.vue-giant-tree .button.chk {position: relative;width: 14px;height: 14px;margin: 0 4px 0 0;border: 1px solid #d7dde4;border-radius: 2px;background: #fff;}.vue-giant-tree .chk.radio_true_full,.vue-giant-tree .chk.radio_false_full,.vue-giant-tree .chk.radio_true_full_focus,.vue-giant-tree .chk.radio_false_full_focus,.vue-giant-tree .chk.radio_false_disable,.vue-giant-tree .chk.radio_true_disable,.vue-giant-tree .chk.radio_true_part,.vue-giant-tree .chk.radio_false_part,.vue-giant-tree .chk.radio_true_part_focus,.vue-giant-tree .chk.radio_false_part_focus {border-radius: 8px;}.vue-giant-tree .button.chk:after {position: absolute;top: 1px;left: 4px;width: 4px;height: 8px;content: "";transition: -webkit-transform 0.2s ease-in-out;transition: transform 0.2s ease-in-out;transition: transform 0.2s ease-in-out, -webkit-transform 0.2s ease-in-out;-webkit-transform: rotate(0deg) scale(0);transform: rotate(0deg) scale(0);border-right: 2px solid #fff;border-bottom: 2px solid #fff;}.vue-giant-tree .button.checkbox_false_full_focus {border-color: #ccc;}.vue-giant-tree .button.checkbox_true_full,.vue-giant-tree .button.checkbox_true_full_focus,.vue-giant-tree .button.checkbox_true_part,.vue-giant-tree .button.checkbox_true_part_focus,.vue-giant-tree .button.checkbox_true_disable {border-color: #39f;background-color: #39f;}.vue-giant-tree .button.checkbox_true_full:after,.vue-giant-tree .button.checkbox_true_full_focus:after,.vue-giant-tree .button.checkbox_true_disable:after {-webkit-transform: rotate(45deg) scale(1);transform: rotate(45deg) scale(1);}.vue-giant-tree .button.checkbox_true_part:after,.vue-giant-tree .button.checkbox_true_part_focus:after {top: 5px;left: 2px;width: 10px;height: 1px;-webkit-transform: rotate(0deg) scale(1);transform: rotate(0deg) scale(1);border-right: 0;}.vue-giant-tree .button.radio_true_full,.vue-giant-tree .chk.radio_true_full_focus,.vue-giant-tree .chk.radio_true_part,.vue-giant-tree .chk.radio_true_part_focus {border-color: #39f;}.vue-giant-tree .button.radio_true_full:after,.vue-giant-tree .chk.radio_true_full_focus:after,.vue-giant-tree .chk.radio_true_part:after,.vue-giant-tree .chk.radio_true_part_focus:after {top: 3px;left: 3px;width: 8px;-webkit-transform: rotate(0deg) scale(1);transform: rotate(0deg) scale(1);border: 0;border-radius: 4px;background: #39f;}.vue-giant-tree .button.checkbox_true_disable,.vue-giant-tree .button.checkbox_false_disable,.vue-giant-tree .chk.radio_false_disable,.vue-giant-tree .chk.radio_true_disable {cursor: not-allowed;}.vue-giant-tree .button.checkbox_false_disable {background-color: #f3f3f3;}.vue-giant-tree .button.noline_close:before,.vue-giant-tree .button.noline_open:before,.vue-giant-tree .button.root_open:before,.vue-giant-tree .button.root_close:before,.vue-giant-tree .button.roots_open:before,.vue-giant-tree .button.roots_close:before,.vue-giant-tree .button.bottom_open:before,.vue-giant-tree .button.bottom_close:before,.vue-giant-tree .button.center_open:before,.vue-giant-tree .button.center_close:before {position: absolute;top: 5px;left: 5px;content: "";transition: -webkit-transform ease 0.3s;transition: transform ease 0.3s;transition: transform ease 0.3s, -webkit-transform ease 0.3s;-webkit-transform: rotateZ(0deg);transform: rotateZ(0deg);-webkit-transform-origin: 25% 50%;transform-origin: 25% 50%;border: 6px solid;border-color: transparent transparent transparent #666;}.vue-giant-tree .button.noline_open:before,.vue-giant-tree .button.root_open:before,.vue-giant-tree .button.roots_open:before,.vue-giant-tree .button.bottom_open:before,.vue-giant-tree .button.center_open:before {-webkit-transform: rotateZ(90deg);transform: rotateZ(90deg);}.vue-giant-tree .button.ico_loading {margin-right: 2px;background: url("data:image/gif;base64,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")0 center no-repeat;}.vue-giant-tree .tmpTargetzTree {opacity: 0.8;background-color: #2ea9df;filter: alpha(opacity=80);}.vue-giant-tree .tmpzTreeMove_arrow {position: absolute;width: 18px;height: 18px;color: #4fcbf0;}ul.ztree.zTreeDragUL {margin: 0;padding: 0;position: absolute;overflow: hidden;background-color: #dedede;border: 1px #4fcbf0 dotted;border-radius: 4px;opacity: 0.7;}.zTreeMask {position: absolute;z-index: 10000;opacity: 0;background-color: #cfcfcf;}

在需要使用的页面引入ztree组件

 
 zTree(vue-giant-tree)延迟加载
export default {name: "app",components: {VueEasyTree,tree: resolve => require(["./ztree.vue"], resolve)},data() {return {nodes: [],showIndex: 0,ztreeObj: null,setting: {check: {enable: true},data: {simpleData: {enable: false,pIdKey: "pid", },key:{name:'departName'}},view: {showIcon: false,addHoverDom: this.addHoverDom,removeHoverDom: this.removeHoverDom,}}};},methods: {addHoverDom(treeid, treeNode) {const item = document.getElementById(`${treeNode.tId}_a`);if (item && !item.querySelector('.tree_extra_btn')) {const btn = document.createElement('sapn');btn.id = `${treeid}_${treeNode.id}_btn`;btn.classList.add('tree_extra_btn');btn.innerText = '删除';btn.addEventListener('click', (e) => {e.stopPropagation()this.clickRemove(treeNode)})item.appendChild(btn);}},removeHoverDom(treeid, treeNode) {const item = document.getElementById(`${treeNode.tId}_a`);if (item) {const btn = item.querySelector('.tree_extra_btn');if (btn) {item.removeChild(btn)}}},clickRemove(treeNode) {console.log('remove', treeNode)this.ztreeObj && this.ztreeObj.removeNode(treeNode)},onClick: function (evt, treeId, treeNode) {// 点击事件console.log(evt.type, treeNode);},onCheck: function (evt, treeId, treeNode) {// 选中事件console.log(evt.type, treeNode);},handleCreated: function (ztreeObj) {this.ztreeObj = ztreeObj;// onCreated 中操作ztreeObj对象展开第一个节点ztreeObj.expandNode(ztreeObj.getNodes()[0], true);//ztreeObj.expandAll(true);},update: function () {// 更新示例数据this.showIndex = this.showIndex === 0 ? 1 : 0;}}};.T {font-size: 34px;margin: 0 0 30px;overflow: hidden;}

第三种：vxe-table-plugin-virtual-tree

这个插件是为了解决vxe-table的v2.0版本不支持虚拟树，vxe-table的3.0版本现在支持虚拟树了，也可以使用vxe-table v3.0。

githup链接：https://github.com/x-extends/vxe-table-plugin-virtual-tree

api链接:

​​​​xe-table v2

这个插件只用了展示树形结构，或者表格树还是比较方便的，但是数据量太大时候，勾选操作还是略卡。但是十万数据以内速度还不错，关键是它可以做成表格树。

总结：

具体用哪一种，看你的具体情况了。
如果仅仅是树形展示，那就第一种vue-easy-tree，方便简单。如果数据量超级大，节点多，但是每个节点的数量不多，还要兼容ie，那就第二种zTree，如果要展示表格树，那就第三种vue-virtual-tree