1import Link from "next/link";   //import this
2     
3<Link href="/">    //wrap a tag with Link
4     <a>Home</a>
5</Link>
6
7<Link href="https://nextjs.org">   //external page
8      <a>Next.js</a>
9 </Link>
10
11
12
13      
14  
15

1import { useRouter } from 'next/router'
2
3function ActiveLink({ children, href }) {
4  const router = useRouter()
5
6  const handleClick = (e) => {
7    e.preventDefault()
8    router.push(href)
9  }
10
11  return (
12    <a href={href} onClick={handleClick} style={style}>
13      {children}
14    </a>
15  )
16}
17
18export default ActiveLink
19

1function getFullUrl(req, fallback) {
2  //server side request object(req)
3  if(req) {
4    return req.protocol + '://' + req.get('host') + req.originalUrl
5    
6  } //making sure we are on the client side
7  else if(!(typeof window === 'undefined')) {
8    return window.location.href
9    
10  } else {
11    return fallback
12  }
13}
14
15//usage on nextjs
16static async getInitialProps({req}) {
17   let fullUrl = getFullUrl(req, "")//gets the full url or fallback to ""
18    return { fullUrl: fullUrl }
19}

1<Link href="/shop/[pid]" as={`/shop/${id}`}>
2	<a>Shop by menu</a>
3</Link>
4