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