`TreeSelect` is similar to `Select`, but the values are provided in a tree like structure. Any data whose entries are defined in a hierarchical manner is fit to use this control. Examples of such case may include a corporate hierarchy, a directory structure, and so on.
| defaultValue | To set the initial selected treeNode(s). | string\|string\[] | - | | |
| disabled | Disabled or not | boolean | false | | |
| dropdownClassName | className of dropdown menu | string | - | | |
| dropdownMatchSelectWidth | Determine whether the dropdown menu and the select input are the same width. Default set `min-width` same as input. Will ignore when value less than select width. `false` will disable virtual scroll | boolean \| number | true | | |
| dropdownStyle | To set the style of the dropdown menu | object | - | | |
| fieldNames | Replace the label,value, key and children fields in treeNode with the corresponding fields in treeData | object | {children:'children', label:'title', key:'key', value: 'value' } | | 3.0.0 |
| filterTreeNode | Whether to filter treeNodes by input value. The value of `treeNodeFilterProp` is used for filtering by default. | boolean\|Function(inputValue: string, treeNode: TreeNode) (should return boolean) | Function | | |
| getPopupContainer | To set the container of the dropdown menu. The default is to create a `div` element in `body`, you can reset it to the scrolling area and make a relative reposition. | Function(triggerNode) | () => document.body | | |
| labelInValue | whether to embed label in value, turn the format of value from `string` to `{value: string, label: VNode, halfChecked: string[]}` | boolean | false | | |
| replaceFields | Replace the label,value, key and children fields in treeNode with the corresponding fields in treeData | object | { children:'children', label:'title', value: 'value' } | | 1.6.1 (3.0.0 deprecated) |
| searchPlaceholder | Placeholder of the search input | string\|slot | - | | |
| searchValue(v-model) | work with `search` event to make search value controlled. | string | - | | |
| showCheckedStrategy | The way show selected item in box. **Default:** just show child nodes. **`TreeSelect.SHOW_ALL`:** show all checked treeNodes (include parent treeNode). **`TreeSelect.SHOW_PARENT`:** show checked treeNodes (just show parent treeNode). | enum { TreeSelect.SHOW_ALL, TreeSelect.SHOW_PARENT, TreeSelect.SHOW_CHILD } | TreeSelect.SHOW_CHILD | | |
| showSearch | Whether to display a search input in the dropdown menu(valid only in the single mode) | boolean | false | | |
| size | To set the size of the select input, options: `large``small` | string | 'default' | | |
| tagRender | Customize tag render when `multiple` | (props) => slot | - | 3.0 | |
| title | custom title | slot | | 3.0.0 | |
| treeCheckable | Whether to show checkbox on the treeNodes | boolean | false | | |
| treeCheckStrictly | Whether to check nodes precisely (in the `checkable` mode), means parent and child nodes are not associated, and it will make `labelInValue` be true | boolean | false | | |
| treeData | Data of the treeNodes, manual construction work is no longer needed if this property has been set(ensure the Uniqueness of each value) | array\\<{ value, title, children, \[disabled, disableCheckbox, selectable] }> | \[] | | |
| treeDataSimpleMode | Enable simple mode of treeData. Changes the `treeData` schema to: \[{id:1, pId:0, value:'1', title:"test1",...},...] where pId is parent node's id). It is possible to replace the default `id` and `pId` keys by providing object to `treeDataSimpleMode` | false\|object\\<{ id: string, pId: string, rootPId: null }> | false | | |
| treeDefaultExpandAll | Whether to expand all treeNodes by default | boolean | false | | |
| treeIcon | Shows the icon before a TreeNode's title. There is no default style; you must set a custom style for it if set to `true` | boolean | false | | |
| treeLine | Show the line. Ref [Tree - showLine](/components/tree/#components-tree-demo-line) | boolean \| object | false | 3.0 | |
| treeNodeFilterProp | Will be used for filtering if `filterTreeNode` returns true | string | 'value' | | |
| treeNodeLabelProp | Will render as content of select | string | 'title' | | |
| value(v-model) | To set the current selected treeNode(s). | string\|string\[] | - | | |
| virtual | Disable virtual scroll when set to false | boolean | true | 3.0 | |
