Next.JS 10

Tenth Version of Next.JS

Next.js 10 released in October 2020, brought several groundbreaking features that enhanced both developer experience and application performance. Here is a detailed overview of what was introduced in Next.js 10:

Here are the key details and features of Next.js 10:

Key Features of Next.js 10

1. Image Optimization

Built-in Image Component: The new <Image> component simplifies handling images with automatic optimization.
Key features:
Automatic resizing and serving images in modern formats like WebP.
Lazy loading by default for performance improvements.
Examples:

import Image from 'next/image';
const MyImage = () => (

<Image
   src="/example.jpg" // Path to the image
   alt="Example Image"
   width={800}
  height={600}
/>
);
export default MyImage

Optimized images are served via a built-in Image Optimization API.

2. Internationalized Routing (i18n)

Native support for internationalized (multilingual) routing.
Enables locale-based URL routing, such as /en, /fr, or /es.
Configuration in next.config.js:

module.exports = {

i18n: {
locales: ['en', 'fr', 'es'],
defaultLocale: 'en',

},
};

Benefits
Automatic locale detection.
Simplified management of language-specific content.

3. Next.js Analytics (Powered by Vercel)

Launched Next.js Analytics to provide real-time insights into application performance.
Monitors:
Page load times.
Visitor metrics.
Web Vitals (e.g., LCP, FID, CLS).

4. Built-in Webpack 5 Support

Experimental support for Webpack 5, bringing performance enhancements and features like:
Better tree-shaking and faster builds.
Smaller client-side bundles.

5. New next/script Component

Introduced the <Script> component for loading third-party scripts efficiently.
Enables deferred or async loading of external scripts.
Example:

import Script from 'next/script';

const MyPage = () => (
<>
<Script src="https://example.com/script.js" strategy="lazyOnload" />
<div>My Page Content</div>
</>
);

Strategies:
lazyOnload: Load script when the browser is idle.
beforeInteractive: Load script before the page becomes interactive.

6. Static File Serving for public/ Directory

Introduced the public/ directory for serving static assets (e.g., images, files).
Benefits:
Files in public/ are accessible via / (root) URLs.
Example: A file public/logo.png can be accessed at http://localhost:3000/logo.png.

7. Automatic Static Generation for More Pages

Improved static generation capabilities:
Pages using getStaticProps can now support incremental static regeneration.
This allows on-demand re-generation of static pages during runtime.

8. Incremental Static Regeneration (ISR) Enhancements

Incremental Static Regeneration was refined for better performance and reliability.
Allows you to update static content without rebuilding the entire site.
Example:

export async function getStaticProps() {
return {
props: { data: 'Hello World' },
revalidate: 60;
};
}

9. Improved Middleware (Preview Mode)

Extended preview mode to allow authenticated previews of draft content.
Simplifies content management workflows with CMS integration.

10. Custom Headers and Middleware Enhancements

Improved support for adding custom headers and handling redirects in next.config.js.

module.exports = {
async headers() {
   return [
    {
     source: '/about',
    headers: [
     { key: 'X-Custom-Header', value: 'MyHeaderValue' },
     ],
    },
  ];
},
};

11. Enhanced CSS and Sass Support

Full support for global and module-based CSS and Sass.
Optimized loading of CSS for faster builds and smaller bundle sizes.

12. Preview Mode Enhancements

Enhanced integration for previewing unpublished content from a CMS or other backend services.

13. Improved Deployment Experience

Seamless integration with Vercel, including instant rollbacks and optimized serverless deployments.

14. Experimental Features

Continued innovation with experimental features like React Concurrent Mode and Server Components.

Key Benefits of Next.js 10:

Simplifies image and script handling for better performance.
Enables seamless multilingual support.
Optimizes static and dynamic content generation for modern web applications.
Provides a robust developer and user experience.

Next.js 10 significantly elevated the framework, making it even more capable for building performant, scalable, and developer-friendly applications.

Next.JS