Why Active link detection in NextJS? - Purpose & Use Cases

The Big Idea

Discover how to make your website navigation smart and effortless with active link detection!

The Scenario

Imagine building a website navigation menu where you want to highlight the current page link so users know where they are.

You try to do this by manually checking the URL and adding styles to the matching link.

The Problem

Manually checking URLs and updating link styles is slow and error-prone.

Every time the user navigates, you must write extra code to update the active link.

This can lead to bugs where the wrong link is highlighted or no link is highlighted at all.

The Solution

Active link detection automatically checks the current page and highlights the matching navigation link.

Next.js provides tools to detect the active route and apply styles dynamically, so you don't have to manage this manually.

Before vs After

✗ Before

if (window.location.pathname === '/about') { link.classList.add('active'); } else { link.classList.remove('active'); }

✓ After

<Link href='/about' className={router.pathname === '/about' ? 'active' : ''}>About</Link>

What It Enables

This makes navigation menus clear and user-friendly by always showing which page is active without extra manual work.

Real Life Example

On an e-commerce site, the menu highlights "Home", "Shop", or "Cart" depending on where the user is, helping them understand their location instantly.

Key Takeaways

Manual active link handling is tedious and error-prone.

Active link detection automates highlighting the current page link.

This improves user experience and reduces code complexity.