Pagination Controls

./app/page.tsx

import PaginationControls from '@/components/PaginationControls'

const data = [
  'entry 1',
  'entry 2',
  'entry 3',
  'entry 4',
  'entry 5',
  'entry 6',
  'entry 7',
  'entry 8',
  'entry 9',
  'entry 10',
]

export default function Home({
  searchParams,
}: {
  searchParams: { [key: string]: string | string[] | undefined }
}) {
  const page = searchParams['page'] ?? '1'
  const per_page = searchParams['per_page'] ?? '5'

  // mocked, skipped and limited in the real app
  const start = (Number(page) - 1) * Number(per_page) // 0, 5, 10 ...
  const end = start + Number(per_page) // 5, 10, 15 ...

  const entries = data.slice(start, end)

  return (
    <div className='flex flex-col gap-2 items-center'>
      {entries.map((entry) => (
        <p key={entry}>{entry}</p>
      ))}

      <PaginationControls
        hasNextPage={end < data.length}
        hasPrevPage={start > 0}
      />
    </div>
  )
}

./components/PaginationControls

'use client'

import { FC } from 'react'
import { useRouter, useSearchParams } from 'next/navigation'

interface PaginationControlsProps {
  hasNextPage: boolean
  hasPrevPage: boolean
}

const PaginationControls: FC<PaginationControlsProps> = (
  {
    hasNextPage,
    hasPrevPage,
  }
) => {
  const router = useRouter()
  const searchParams = useSearchParams()

  const page = searchParams.get('page') ?? '1'
  const per_page = searchParams.get('per_page') ?? '5'

  return (
    <div className='flex gap-2'>
      <button
        className='bg-blue-500 text-white p-1'
        disabled={!hasPrevPage}
        onClick={() => {
          router.push(`/?page=${Number(page) - 1}&per_page=${per_page}`)
        }}>
        prev page
      </button>

      <div>
        {page} / {Math.ceil(10 / Number(per_page))}
      </div>

      <button
        className='bg-blue-500 text-white p-1'
        disabled={!hasNextPage}
        onClick={() => {
          router.push(`/?page=${Number(page) + 1}&per_page=${per_page}`)
        }}>
        next page
      </button>
    </div>
  )
}

export default PaginationControls