Link component for client navigation in NextJS - Step-by-Step Execution

Concept Flow - Link component for client navigation

User clicks Link

↓

Intercept click event

↓

Prevent full page reload

↓

Update URL in browser

↓

Load new page component client-side

↓

Render new page content

↓

User sees new page instantly

When a user clicks a Next.js Link, it stops the browser from reloading the page. Instead, it changes the URL and loads the new page content quickly on the client side.

Execution Sample

NextJS

import Link from 'next/link';

export default function Home() {
  return <Link href="/about">Go to About</Link>;
}

This code shows a Link component that navigates to the About page without reloading the whole browser page.

Execution Table

Step	Action	Event	Result	Browser URL	Page Rendered
1	User clicks Link	click event intercepted	Prevent full reload	/	Home page still visible
2	Next.js updates URL	pushState called	URL changes without reload	/about	Home page still visible
3	Next.js loads About page component	client-side fetch	About page component ready	/about	Home page still visible
4	Next.js renders About page	React render	DOM updates to About page	/about	About page visible
5	User sees About page	no full reload	Fast navigation	/about	About page visible

💡 Navigation completes when About page is rendered client-side without full page reload

Variable Tracker

Variable	Start	After Click	After URL Update	After Page Load	Final
currentURL	"/"	"/"	"/about"	"/about"	"/about"
pageComponent	"Home"	"Home"	"Home"	"About"	"About"
isFullReload	true	false	false	false	false

Key Moments - 3 Insights

Why doesn't the browser reload the whole page when clicking the Link?

Because Next.js intercepts the click event (see execution_table step 1) and uses client-side navigation to update the URL and page content without a full reload.

How does the URL change without reloading the page?

Next.js uses the browser's history API (pushState) to change the URL (see execution_table step 2) while keeping the current page loaded.

When does the new page content actually appear?

After Next.js loads and renders the new page component client-side (see execution_table steps 3 and 4), the DOM updates to show the new page.

Visual Quiz - 3 Questions

Look at the execution table, what is the browser URL immediately after the click event is intercepted?

A "/about"

B "/"

C "/home"

D "/contact"

💡 Hint

Check the 'Browser URL' column at step 1 in the execution_table.

At which step does the page component change from Home to About?

A Step 3

B Step 2

C Step 4

D Step 5

💡 Hint

Look at the 'pageComponent' variable in variable_tracker and the 'Page Rendered' column in execution_table.

If the Link did not intercept the click, what would happen?

A The About page would load instantly client-side

B The URL would not change

C The page would reload fully

D Nothing would happen

💡 Hint

Refer to key_moments question about preventing full reload and execution_table step 1.

Concept Snapshot

Next.js Link component:
- Wraps anchor tags for client navigation
- Intercepts clicks to prevent full reload
- Uses pushState to update URL
- Loads new page component client-side
- Renders new page instantly
- Improves speed and user experience

Full Transcript

The Next.js Link component helps users navigate between pages without the browser reloading the whole page. When a user clicks the Link, Next.js catches the click event and stops the browser from doing a full reload. Instead, it changes the URL using the browser's history API and loads the new page content on the client side. This makes navigation faster and smoother. The execution table shows each step: click intercepted, URL updated, new page component loaded, and finally the new page rendered. Variables like currentURL and pageComponent update accordingly. This process avoids full page reloads and improves user experience.