How to make server filters on the frontend?

Question

css

They gave me the task to make server-side filters for data... I have no idea how it is... Purely visually, I don't understand what it looks like. It seems like this is never done. Typically, filters are implemented on the client side... Well, you need to type so that the query to the database was already with a filter, that's all clear. But I can’t understand how it will look on the page ... For example, again, take a list of people who need to be displayed with pagination by letter groups, such as A-B, G-I ... Can someone at least outwardly outline how should server filters look like on the page? Never seen these...

Answer 1

https://learn.javascript.ru/task/sum-many-brackets