Tree element Tree menu radio

Transfer: https://blog.csdn.net/weixin_33975951/article/details/87219177 

<el-tree
  :data="treeData"
  show-checkbox
  node-key="id"  
  :props="defaultProps"
  check-strictly
  @check-change="handleClick" 
  ref="treeForm">           
</el-tree>
 
ref  vue 的引用信息
node-key="id"   树节点的唯一标识(查看官网API)
:props="defaultProps"  tree树的默认属性修改
check-strictly   父节点不相关联子节点
 
@check-change="handleClick"  当前节点变化时处理事件

export default{
    data(){
        return {
            i:0,
        }
    },
    methods:{
        handleClick(data,checked, node) {
            this.i++;
            if(this.i%2===0){
                if(checked){
                    this.$refs.treeForm.setCheckedNodes([]);
                    this.$refs.treeForm.setCheckedNodes([data]);
                    //交叉点击节点
                }else{
                    this.$refs.treeForm.setCheckedNodes([]);
                    //点击已经选中的节点，置空
                }
            }
        },
    }
}