How do you calculate total pages in pagination?
Math.ceil(totalItems / pageSize). For example, 100 items with pageSize 10 = 10 pages. 105 items with pageSize 10 = 11 pages (the last page has 5 items).
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More FAQs in Building a Pagination Component: A Complete Guide
Calculate total pages (Math.ceil(total / pageSize)). Slice the data for the current page: data.slice((page - 1) * pageSize, page * pageSize). Render page numbers with ellipsis for many pages. Highlight the current page. Add prev/next buttons with disabled states.
If total pages > 7, show: first few pages, ..., current and neighbors, ..., last few pages. If current is near the start: [1, 2, 3, 4, 5, ..., total]. If near the end: [1, ..., total-4, total-3, total-2, total-1, total]. If in the middle: [1, ..., current-1, current, current+1, ..., total].
Client-side: fetch all data, slice in the browser (data.slice). Good for small datasets. Server-side: fetch only the current page from the API (/api/data?page=1&size=10). Good for large datasets. Server-side is more scalable.
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