Summary of business logic involved

I. Paging logic

When a page does not appear, the page bar appears! This depends on the specific situation!

Variables used: Current page number,

If the current number of pages is 1, then the previous button is disabled, otherwise the previous button can be used. You must know the page numbers of the current pages here.

If the current page number equals the total page count, the Next button is disabled, otherwise the next page button is available. You have to know the total number of pages in this page Oh!

Summary of business logic involved