Why layouts avoid redundant rendering in NextJS - See It in Action

Why layouts avoid redundant rendering in Next.js

📖 Scenario: You are building a simple blog website using Next.js. You want to create a layout that wraps all pages with a header and footer. This layout should not re-render unnecessarily when you navigate between pages, so the header and footer stay stable and fast.

🎯 Goal: Create a Next.js layout component that wraps page content and avoids redundant rendering when switching pages.

📋 What You'll Learn

Create a RootLayout component with a header, main content area, and footer

Use the children prop to render page content inside the layout

Ensure the layout component does not re-render when navigating between pages

Use Next.js App Router conventions with a layout.tsx file

💡 Why This Matters

🌍 Real World

Layouts in Next.js help keep common page parts like headers and footers stable and fast, improving user experience by avoiding unnecessary re-renders.

💼 Career

Understanding layout optimization is important for building efficient, scalable React and Next.js applications used in professional web development.

1

Create the RootLayout component with header and footer

Create a RootLayout component in app/layout.tsx that returns a html element with lang="en". Inside it, add a body element containing a header with text "My Blog Header" and a footer with text "My Blog Footer".

NextJS

export default function RootLayout({ children }) {
  // Your code here
}

Need a hint?

Remember to wrap the content in html and body tags as Next.js expects.

2

Add the children prop inside the layout body

Inside the body element of RootLayout, add a main element that renders the children prop. This will display the page content inside the layout.

NextJS

export default function RootLayout({ children }) {
  return (
    
      
        My Blog Header
        
          {/* Render page content here */}
        
        My Blog Footer
      
    
  )
}

Need a hint?

The children prop holds the content of the current page.

3

Add a config variable to enable layout caching

Add a export const dynamic = 'error' line at the top of app/layout.tsx to tell Next.js to treat this layout as static and avoid re-rendering it on navigation.

NextJS

// Add dynamic config to avoid redundant rendering
export default function RootLayout({ children }) {
  return (
    
      
        My Blog Header
        {children}
        My Blog Footer
      
    
  )
}

Need a hint?

This config tells Next.js not to re-render the layout on client navigation.

4

Complete the layout with metadata export

Add an export named metadata with a title property set to "My Blog" at the top of app/layout.tsx. This completes the layout setup with page title metadata.

NextJS

// Add metadata export for page title
export const dynamic = 'error'

export default function RootLayout({ children }) {
  return (
    
      
        My Blog Header
        {children}
        My Blog Footer
      
    
  )
}

Need a hint?

Metadata helps set the page title and other info in Next.js.