<template>
  <div class="tree">   
  
  <el-tree :data="data5" node-key="id" default-expand-all >
    <span class="custom-tree-node" slot-scope="{ node, data }">
      <span>
        <i :class="node.icon"></i>{{ node.label }}
      </span>       
    </span>
  </el-tree>

  </div>
</template>

<script>
  export default {
    data () {
      return {
         data5: [{
          id: 1,
          label: '一级 1',
          icon:'el-icon-success',
          children: [{
            id: 4,
            label: '二级 1-1',
            children: [{
              id: 9,
              label: '三级 1-1-1',
              icon: 'el-icon-info'
            }, {
              id: 10,
              label: '三级 1-1-2'
            }]
          }]
        }, {
          id: 2,
          label: '一级 2',
          children: [{
            id: 5,
            label: '二级 2-1',
          }, {
            id: 6,
            label: '二级 2-2'
          }]
        }, {
          id: 3,
          label: '一级 3',
          children: [{
            id: 7,
            label: '二级 3-1'
          }, {
            id: 8,
            label: '二级 3-2'
          }]
        }]
      }
    }
  
  }
</script>

<style scoped>

</style>