1.el-tree单选

handleCheckChange(item,checked,self){
            if(checked){
                this.editCheckd = item.id
                this.$refs.menuTree.setCheckedKeys([item.id]);
            }else{
                if(this.editCheckd === item.id){
                    this.$refs.menuTree.setCheckedKeys([item.id]);
                }
                
            }
         }
                
check-strictly
父子不互相关联