How to do this kind of sorting?

Question

JavaScript

It is necessary to implement such sorting using JS

So far, I can’t even catch on to anything, let alone implement it. Help with advice on which way to dig to do this, or share a link to an example.

Answer 1

You can keep all the blocks initially hidden on the page, and show the one you need, or you can load AJAX by clicking on a certain letter, do you have a question that you don’t know how to do it at all? That is, lack of knowledge or ideas?

Answer 2

As for me, I would make sections and child subsections in the CMS (if CMS is used), then display them as 4 leveled sublists, and through JQ hide them and make a drop-down menu.
I would also sort through the server and CMS, since this will be calculated and cached once, and JQ will recalculate everything in the browser for each user.
I would use CMS tools, PHP (well, or the language that you have responsible for the server), HTML, CSS and JS in combination.

Answer 3

It's like not sorting.
Sorting is when you manipulate already loaded data. And you need to load them dynamically.
The logic is pretty simple - click on an element in the first column, make an Ajax request, load the response in the second. Etc.
This is the easiest option that came to mind.