NEXT 15 is here! : What's New and Exciting?
Tags: webdev, nextjs, typescript, javascript
Published: 2024-05-25 04:31:02

Tired of the tedious setup process for React projects? Buckle up, because **Next.js 15** is here to save the day! Spearheaded by Vercel CEO Guillermo Rauch, this major update focuses on efficiency and streamlines the development process. Let's dive into the exciting features of Next.js 15 and see how they can elevate your development workflow to new heights!

## Major Improvements in Next.js 15

### 1. Enhanced Caching
With Next.js 15, caching improvements are significant, making it easier and more intuitive to handle your app's performance. No more headaches managing cache - "Caching no longer sucks!"

### 2. Hydration Errors and Developer Experience
Hydration errors are a thing of the past. The developer experience is now more robust and reliable, catering to both seasoned pros and newcomers alike. Next.js 15 ensures a smooth development process.

### 3. Addressing Common Concerns
Some developers fear that Next.js is becoming too magical, requiring constant rewrites. However, after exploring Next.js 15, it's clear these enhancements integrate seamlessly with existing projects.

## Next.js 15 Features Breakdown

### 4. Server Actions
Server Actions are a game-changer, allowing you to define server-side functions directly within your React components, simplifying data fetching and other server-side operations.

```ts
import { serverAction } from 'next/server';

export default function MyComponent() {
  const handleAction = serverAction(async () => {
    // Perform server-side operations here
  });

  return <button onClick={handleAction}>Do Action</button>;
}
```

### 5. Partial Pre-Rendering (PPR) (Experimental)
Next.js 15 introduces Partial Pre-Rendering (PPR), enabling parts of your page to be static (SSG) while others are dynamic (SSR or ISR). This flexibility combines the best of both worlds.

![Partial Pre-Rendering](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/5vy61a0r56is67rjr4x2.png)

### 6. React 19 Support
Next.js 15 supports React 19, including the new React Compiler. This means better performance and fewer hooks to manage, thanks to automatic code optimizations.

### 7. Enhanced Middleware
Middleware capabilities have been improved, allowing for more complex and efficient request handling. Ideal for developers leveraging serverless functions or edge computing.

### 8. Next After (Experimental)
Next After prioritizes important tasks, letting the server handle secondary tasks in the background. This ensures faster initial load times for users. For example, YouTube processes your request and sends you the video first, then updates analytics later.

### 9. Turbo Pack
Turbo Pack is the new high-speed bundler replacing Webpack in development mode. It promises faster and smoother development, enhancing the overall developer experience.

Enable Turbopack with the `--turbo` flag:

```sh
npx create-next-app@rc --turbo
```

### 10. Improved External Package Handling
Next.js 15 bundles external packages by default, improving the cold start of applications and reducing latency. This results in a smoother, faster experience for both developers and users.

## How to Use Next.js 15
To start using Next.js 15, run the following command:

```sh
npm install next@rc react@rc react-dom@rc
```

## Conclusion
Next.js 15 is a significant leap forward, packed with features that enhance both development and user experience. From improved caching and server actions to partial pre-rendering and Turbo Pack, it’s designed to make your life as a developer easier and more productive.

**Happy Coding! :)**