SOURCE

console 命令行工具 X clear

                    
>
console
var Main = {
    data() {
      return {
        data: [{
          id: 1,
          label: '一级 1',
          children: [{
            id: 4,
            label: '二级 1-1',
            children: [{
              id: 9,
              label: '三级 1-1-1'
            }, {
              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'
          }]
        }],
        defaultProps: {
          children: 'children',
          label: 'label'
        }
      };
    },
    methods:{
        submit(){
          const checkedKeys = this.$refs.tree.getCheckedKeys()
          const hafcheckedKeys = this.$refs.tree.getHalfCheckedKeys()
          console.log(checkedKeys,hafcheckedKeys)
        }
    }
  };
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')
<script src="https://unpkg.com/vue@2.7.14/dist/vue.js"></script>
<script src="https://unpkg.com/element-ui@2.15.12/lib/index.js"></script>
<div id="app">
<el-tree
  ref="tree"
  :data="data"
  show-checkbox
  node-key="id"
  :default-expanded-keys="[2, 3]"
  :default-checked-keys="[5]"
  :props="defaultProps">
</el-tree>
<el-button @click="submit">ddddd</el-button>
</div>
@import url("https://unpkg.com/element-ui@2.15.12/lib/theme-chalk/index.css");