ant-design-vue/components/tree-select/demo/treeData.md

#### 从数据直接生成 使用 `treeData` 把 JSON 数据直接生成树结构。 #### Generate form tree data The tree structure can be populated using `treeData` property. This is a quick and easy way to provide the tree content.

<template>
  <a-tree-select
    style="width: 300px"
    :dropdownStyle="{ maxHeight: '400px', overflow: 'auto' }"
    :treeData="treeData"
    placeholder="Please select"
    treeDefaultExpandAll
    v-model="value"
  >
    <span style="color: #08c" slot="title" slot-scope="{key, value}" v-if="key='0-0-1'">
      Child Node1 {{value}}
    </span>
  </a-tree-select>
</template>

<script>
  const treeData = [
    {
      title: 'Node1',
      value: '0-0',
      key: '0-0',
      children: [
        {
          value: '0-0-1',
          key: '0-0-1',
          scopedSlots: {
            // custom title
            title: 'title',
          },
        },
        {
          title: 'Child Node2',
          value: '0-0-2',
          key: '0-0-2',
        },
      ],
    },
    {
      title: 'Node2',
      value: '0-1',
      key: '0-1',
    },
  ];
  export default {
    data() {
      return {
        value: undefined,
        treeData,
      };
    },
    watch: {
      value(value) {
        console.log(value);
      },
    },
  };
</script>