Page list nesting problem_html/css_WEB-ITnose

HTML Navigation List

How to use HTML to achieve level-by-level nesting of lists, briefly describe it, because pictures cannot be uploaded.
For example, in a School of Information page, there are three navigation box buttons. Click one of them (such as computer major), and a list will appear. Click another one in the list (such as level 9), and another list will appear. Select Classes 1, 2, 3, and 4, then click on one at will (such as Class 2), and a list will appear (meaning the list is nested layer by layer). The list contains student names, student ID numbers, student contact information, etc. Choice, that’s what it means. How to implement it using HTML? Thank you so much! ! !

Reply to the discussion (solution)

What is so difficult about this? Wouldn’t nesting it directly be OK?

                                                                      
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The nesting of these uls should be generated on the server side.

What’s so difficult about this? Wouldn’t nesting it directly be OK?


                                                                      
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The nesting of these uls should be generated on the server side. How to set ul to be hidden?