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edu-giant-tree

v0.0.1

Published

[![npm](https://img.shields.io/npm/v/vue-giant-tree.svg)](https://www.npmjs.com/package/vue-giant-tree/) [![license](https://img.shields.io/github/license/tower1229/vue-giant-tree.svg)]()

Downloads

2

Readme

vue-giant-tree

npm license

:deciduous_tree: 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。

logo

为什么需要vue-giant-tree

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。

不服气可以试试这份数据 big-tree.json

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

ztree在性能优化方面已经做到了近乎极致,感谢ztree作者的工作,向您致敬!

安装

npm i vue-giant-tree --save

使用

in script:

import tree from "vue-giant-tree";

export default {
	components: {
          tree
	},
	data() {
		return {
			nodes: [
                    { id:1, pid:0, name:"随意勾选 1", open:true},
                    { id:11, pid:1, name:"随意勾选 1-1", open:true},
                    { id:111, pid:11, name:"随意勾选 1-1-1"},
                    { id:112, pid:11, name:"随意勾选 1-1-2"},
                    { id:12, pid:1, name:"随意勾选 1-2", open:true},
                    { id:121, pid:12, name:"随意勾选 1-2-1"},
                    { id:122, pid:12, name:"随意勾选 1-2-2"},
                    { id:2, pid:0, name:"随意勾选 2", checked:true, open:true},
                    { id:21, pid:2, name:"随意勾选 2-1"},
                    { id:22, pid:2, name:"随意勾选 2-2", open:true},
                    { id:221, pid:22, name:"随意勾选 2-2-1", checked:true},
                    { id:222, pid:22, name:"随意勾选 2-2-2"},
                    { id:23, pid:2, name:"随意勾选 2-3"}
                ]
		}
	},
    methods: {
        onClick(evt, treeId, treeNode) {

        },
        onCheck(evt, treeId, treeNode) {

        },
        handleCreated(ztreeObj) {

        }
    }
	...

in template:

<tree 
    :nodes="nodes" 
    @onClick="onClick"
    @onCheck="onCheck"
    @onCreated="handleCreated"
/>

属性

| 参数 | 说明 | 类型 | 默认值 | | ---- | ---- | --- | --- | | setting | ztree 配置 | Object | {view: {showIcon: false}} | | nodes | ztree 数据 | Array | [] |

事件

完全移植zTree APIcallback支持的事件,除了:

  • 不支持所有 before 开头的事件。这类事件的主要作用是根据返回值决定是否阻止后续的on事件,这种判断可以在on事件中实现;当然,你也可以通过setting.callback.beforeXXX自行配置
  • 不支持 onNodeCreated 事件。因为在大数据量下很耗性能,如果需要可以通过 setting.callback.onNodeCreated 自行传入
  • 增加 onCreated 事件。每次实例初始化完成时触发,回调参数接收ztree实例,通过ztree实例可以使用所有实例方法

| 事件名称 | 说明 | | ---- | ---- | | onAsyncError | 参考 zTree API | | onAsyncSuccess | 参考 zTree API | | onCheck | 参考 zTree API | | onClick | 参考 zTree API | | onCollapse | 参考 zTree API | | onDblClick | 参考 zTree API | | onDrag | 参考 zTree API | | onDragMove | 参考 zTree API | | onDrop | 参考 zTree API | | onExpand | 参考 zTree API | | onMouseDown | 参考 zTree API | | onMouseUp | 参考 zTree API | | onRemove | 参考 zTree API | | onRename | 参考 zTree API | | onRightClick | 参考 zTree API | | onCreated | 初始化渲染完成后触发,回调参数接收ztree实例 |

扩展

zTree没有提供给整个实例更新数据的方法,vue-giant-tree基于Vue的组件通信机制扩展实现了响应式数据特性,只要nodes的值发生变化,ztree实例就会随之更新。

项目DEMO里演示了vue-giant-tree的响应式数据特性。

演示

  • 线上演示:

http://refined-x.com/Vue-Giant-Tree/

  • 本地演示:
npm i 
npm run serve 

License

MIT

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