element-plus/packages/tree/doc/basic9.vue

<template>
  <el-tree
    :data="data"
    :props="defaultProps"
    accordion
    @node-click="handleNodeClick"
  />
</template>


<script>
export default {
  data() {
    return {
      data: [{
        label: '一级 1',
        children: [{
          label: '二级 1-1',
          children: [{
            label: '三级 1-1-1',
          }],
        }],
      }, {
        label: '一级 2',
        children: [{
          label: '二级 2-1',
          children: [{
            label: '三级 2-1-1',
          }],
        }, {
          label: '二级 2-2',
          children: [{
            label: '三级 2-2-1',
          }],
        }],
      }, {
        label: '一级 3',
        children: [{
          label: '二级 3-1',
          children: [{
            label: '三级 3-1-1',
          }],
        }, {
          label: '二级 3-2',
          children: [{
            label: '三级 3-2-1',
          }],
        }],
      }],
      defaultProps: {
        children: 'children',
        label: 'label',
      },
    }
  },
  methods: {
    handleNodeClick(data) {
      console.log(data)
    },
  },
}
</script>