elementUI Tree 树形控件的官方使用文档

id: 3,
label: '二级 2-1',
children: [{
id: 4,
label: '三级 3-1-1'
}, {
id: 5,
label: '三级 3-1-2',
disabled: true
}] }, {
id: 2,
label: '二级 2-2',
disabled: true,
children: [{
id: 6,
label: '三级 3-2-1'
}, {
id: 7,
label: '三级 3-2-2',
disabled: true
}] }] }],
defaultProps: {
children: 'children',
label: 'label'
}
};
}
};
</script>

树节点的选择

本例展示如何获取和设置选中节点。获取和设置各有两种方式：通过 node 或通过 key。如果需要通过 key 来获取或设置，则必须设置

node-key

。 

<el-tree
 :data="data2"
 show-checkbox
 default-expand-all
 node-key="id"
 ref="tree"
 highlight-current
 :props="defaultProps">
</el-tree>
<div class="buttons">
 <el-button @click="getCheckedNodes">通过 node 获取</el-button>
 <el-button @click="getCheckedKeys">通过 key 获取</el-button>
 <el-button @click="setCheckedNodes">通过 node 设置</el-button>
 <el-button @click="setCheckedKeys">通过 key 设置</el-button>
 <el-button @click="resetChecked">清空</el-button>
</div>
<script>
 export default {
 methods: {
  getCheckedNodes() {
  console.log(this.$refs.tree.getCheckedNodes());
  },
  getCheckedKeys() {
  console.log(this.$refs.tree.getCheckedKeys());
  },
  setCheckedNodes() {
  this.$refs.tree.setCheckedNodes([{
   id: 5,
   label: '二级 2-1'
  }, {
   id: 9,
   label: '三级 1-1-1'
  }]);
  },
  setCheckedKeys() {
  this.$refs.tree.setCheckedKeys([3]);
  },
  resetChecked() {
  this.$refs.tree.setCheckedKeys([]);
  }
 },
 data() {
  return {
  data2: [{
   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'
  }
  };
 }
 };
</script>

自定义节点内容