vant/docs/examples-docs/en-US/tree-select.md

TreeSelect

Install

import { TreeSelect } from 'vant';

Vue.component(TreeSelect.name, TreeSelect);

Usage

Basic Usage

:::demo Basic Usage

<van-tree-select
  :items="items"
  :main-active-index="mainActiveIndex"
  :active-id="activeId"
  @navclick="onNavClick"
  @itemclick="onItemClick"
></van-tree-select>

export default {
  data() {
    return {
      items: items,
      // the index of parent item
      mainActiveIndex: 0,
      // the id of selected item
      activeId: 1001
    };
  },
  methods: {
    onNavClick(index) {
      this.mainActiveIndex = index;
    },
    onItemClick(data) {
      console.log(data);
      this.activeId = data.id;
    }
  }
}

:::

API

Properties

Attribute	Description	Type	Default	必须
items	Required datasets for the component, see Data Structure for detail.	Array	[]	-
mainActiveIndex	The index of selected parent node	Number	0	-
activeId	Id of selected item	Number	0	-

Event

Event	Description	Attribute
navclick	triggered when parent node is selected	index: index of selected parent
itemclick	triggered when item is selected	data: selected item

Data Structure

Data Structure of items

items should be an array contains specified tree objects.

In every tree object, text property defines the name, id stands for the unique key while the children contains sub-tree objects.

[
  {
    // name of the parent node
    text: 'All Cities',
    // leaves of this parent node
    children: [
      {
        // name of the leaf node
        text: 'Washington',
        // id of the leaf node, component highlights leaf node by comparing the activeId with this.
        id: 1002
      },
      {
        // name of the leaf node
        text: 'Baltimore',
        // id of the leaf node, component highlights leaf node by comparing the activeId with this.
        id: 1001
      }
    ]
  }
]