The content taught by the teacher can only delete the category and subcategories, but the subcategories of the subcategories cannot be deleted
Can only be deleted at one level, and if there is content under subcategories, deletion is not allowed
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Can only be deleted at one level, and if there is content under subcategories, deletion is not allowed