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- [Enlgish](#Brief)
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# 中文
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## 写在前面
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此组件仅提供一个创建 `TreeTable` 的解决思路。它基于`element-ui`的 table 组件实现，通过`el-table`的`row-style`方法，在里面判断元素是否需要隐藏或者显示，从而实现`TreeTable`的展开与收起。
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并且本组件充分利用 `vue` 插槽的特性来方便用户自定义。
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`evel.js` 里面，`addAttrs` 方法会给数据添加几个属性，`treeTotable` 会对数组扁平化。这些操作都不会破坏源数据，只是会新增属性。
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## Props 说明
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| Attribute | Description | Type | Default |
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| :--------------: | :--------------------------------- | :-----: | :------: |
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| data | 原始展示数据 | Array | [] |
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| columns | 列属性 | Array | [] |
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| defaultExpandAll | 默认是否全部展开 | Boolean | false |
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| defaultChildren | 指定子树为节点对象的某个属性值 | String | children | |
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| indent | 相邻级节点间的水平缩进，单位为像素 | Number | 50 |
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> 任何 `el-table` 的属性都支持，例如`border`、`fit`、`size`或者`@select`、`@cell-click`等方法。详情属性见`el-table`文档。
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---
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### 代码示例
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```html
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<tree-table :data="data" :columns="columns" border>
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```
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#### data(**必填**)
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```js
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const data = [
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{
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name:'1'
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children: [
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{
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name: '1-1'
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},
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{
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name: '1-2'
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}
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]
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},
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{
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name: `2`
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}
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]
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```
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#### columns(**必填**)
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- label: 显示在表头的文字
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- key: 对应 data 的 key。treeTable 将显示相应的 value
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- expand: `true` or `false`。若为 true，则在该列显示展开收起图标
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- checkbox: `true` or `false`。若为 true，则在该列显示`checkbox`
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- width: 每列的宽度，为一个数字(可选)。例如`200`
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- align: 对齐方式 `left/center/right`
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- header-align: 表头对齐方式 `left/center/right`
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```javascript
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const columns = [
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{
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label: 'Checkbox',
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checkbox: true
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},
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{
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label: '',
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key: 'id',
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expand: true
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},
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{
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label: 'Event',
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key: 'event',
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width: 200,
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align: 'left'
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},
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{
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label: 'Scope',
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key: 'scope'
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}
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]
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```
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> 树表组件将会根据 columns 的 key 属性生成具名插槽，如果你需要对列数据进行自定义，通过插槽即可实现
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```html
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<template slot="your key" slot-scope="{scope}">
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<el-tag>level: {{ scope.row._level }}</el-tag>
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<el-tag>expand: {{ scope.row._expand }}</el-tag>
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<el-tag>select: {{ scope.row._select }}</el-tag>
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</template>
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```
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## Events
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目前提供了几个方法，不过只是`beta`版本，之后很可能会修改。
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```js
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this.$refs.TreeTable.addChild(row, data) //添加子元素
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this.$refs.TreeTable.addBrother(row, data) //添加兄弟元素
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this.$refs.TreeTable.delete(row) //删除该元素
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```
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## 其他
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如果有其他的需求，请参考[el-table](http://element-cn.eleme.io/#/en-US/component/table)的 api 自行修改 index.vue
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# English
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## Brief
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This component only provides a solution for creating `TreeTable`. It is based on the `element-ui` table component. It uses the `row-style` method of `el-table` to determine whether the element needs to be hidden or displayed.
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And this component makes full use of the features of the `vue` slot to make it user-friendly.
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In `evel.js`, the `addAttrs` method adds several properties to the data, and `treeTotable` flattens the array. None of these operations will destroy the source data, just add properties.
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## Props
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| Attribute | Description | Type | Default |
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| :--------------: | :----------------------------------------------------------- | :-----: | :------: |
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| data | original display data | Array | [] |
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| columns | column attribute | Array | [] |
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| defaultExpandAll | whether to expand all nodes by default | Boolean | false |
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| defaultChildren | specify which node object is used as the node's subtree | String | children | |
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| indent | horizontal indentation of nodes in adjacent levels in pixels | Number | 50 |
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> Any of the `el-table` properties are supported, such as `border`, `fit`, `size` or `@select`, `@cell-click`. See the ʻel-table` documentation for details.
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---
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### Example
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```html
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<tree-table :data="data" :columns="columns" border>
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```
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#### data(**Required**)
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```js
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const data = [
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{
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name:'1'
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children: [
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{
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name: '1-1'
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},
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{
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name: '1-2'
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}
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]
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},
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{
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name: `2`
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}
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]
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```
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#### columns(**Required**)
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- label: text displayed in the header
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- key: data.key will show in column
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- expand: `true` or `false`
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- checkbox: `true` or `false`
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- width: column width 。such as `200`
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- align: alignment `left/center/right`
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- header-align: alignment of the table header `left/center/right`
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```javascript
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const columns = [
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{
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label: 'Checkbox',
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checkbox: true
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},
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{
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label: '',
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key: 'id',
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expand: true
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},
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{
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label: 'Event',
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key: 'event',
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width: 200,
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align: 'left'
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},
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{
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label: 'Scope',
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key: 'scope'
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}
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]
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```
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> The tree table component will generate a named slot based on the key property of columns. If you need to customize the column data, you can do it through the slot.
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```html
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<template slot="your key" slot-scope="{scope}">
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<el-tag>level: {{ scope.row._level }}</el-tag>
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<el-tag>expand: {{ scope.row._expand }}</el-tag>
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<el-tag>select: {{ scope.row._select }}</el-tag>
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</template>
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```
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## Events
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Several methods are currently available, but only the `beta` version, which is likely to be modified later.
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```js
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this.$refs.TreeTable.addChild(row, data) //Add child elements
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this.$refs.TreeTable.addBrother(row, data) //Add a sibling element
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this.$refs.TreeTable.delete(row) //Delete the element
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```
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## Other
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If you have other requirements, please refer to the [el-table](http://element-cn.eleme.io/#/en-US/component/table) api to modify the index.vue
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