What is Template in Next.js: Explanation and Example

In Next.js, a template usually refers to a reusable page or component structure that dynamically renders content based on data or URL parameters. Templates help create consistent layouts or pages by filling placeholders with different data, often using dynamic routes and React components.

How It Works

Think of a template in Next.js like a cookie cutter. You have one shape (the template) that you use to make many cookies (pages) that look similar but can have different decorations (content). Instead of writing a new page for every item, you create one template that changes based on the data it receives.

Next.js uses dynamic routes and React components to build these templates. When a user visits a URL with a dynamic segment (like /product/123), Next.js loads the template component and fills it with data for product 123. This way, one template can serve many pages efficiently.

Example

This example shows a simple Next.js page template that displays a blog post based on the post ID from the URL.

javascript

import { useRouter } from 'next/router';

export default function PostTemplate() {
  const router = useRouter();
  const { id } = router.query;

  return (
    <main>
      <h1>Blog Post Template</h1>
      <p>Showing content for post ID: {id}</p>
    </main>
  );
}

Output

Blog Post Template
Showing content for post ID: 123 (if URL is /post/123)

When to Use

Use templates in Next.js when you want to create multiple pages that share the same layout but show different content. Common cases include product pages, blog posts, user profiles, or any page where the content changes based on the URL or data.

This approach saves time and keeps your code clean because you write the layout once and reuse it for many pages. It also improves performance by leveraging Next.js's dynamic routing and static generation features.

Key Points

• Templates in Next.js are reusable page components that render dynamic content.
• They often use dynamic routes to change content based on URL parameters.
• Templates help maintain consistent layouts across many pages.
• They improve development speed and app performance.

Key Takeaways

Templates in Next.js are reusable components that render pages dynamically based on data or URL.

Dynamic routes enable templates to serve many pages with different content using one code structure.

Templates keep your app organized and efficient by avoiding repeated code for similar pages.

Use templates for product pages, blogs, profiles, or any content-driven pages.

Next.js templates leverage React components and routing to deliver fast, scalable apps.