Mastering SvelteKit: A Comprehensive Guide to Pages and Routing

The SvelteKit Pages tutorial provides a thorough introduction to creating and managing pages within a SvelteKit application. This guide will walk you through essential topics such as routing, file structure, and the creation of dynamic routes.

Key Concepts

1. File-Based Routing

• SvelteKit employs a file-based routing system.
• Each .svelte file located in the src/routes directory corresponds to a specific route in your application.

2. Creating Pages

• To generate a new page, simply add a new .svelte file in the src/routes directory.
• For example:
  • src/routes/about.svelte creates a route at /about.

3. Dynamic Routes

• Dynamic routes can be created using square brackets in the file name.
• For instance:
  • src/routes/blog/[slug].svelte generates a route like /blog/my-first-post, where my-first-post represents the value of slug.

4. Nested Routes

• Nested routes can be achieved by adding folders within the src/routes directory.
• For example:
  • src/routes/blog/index.svelte corresponds to /blog.
  • src/routes/blog/[slug].svelte corresponds to /blog/my-first-post.

5. Layout Files

• Layout files enable the sharing of components across multiple pages.
• A layout file named +layout.svelte can be created in a folder to wrap routes within that folder.

Examples

Creating a Basic Page

// src/routes/index.svelte
<script>
  export let name = 'world';
</script>

<h1>Hello {name}!</h1>

• This creates a homepage that greets the user.

Dynamic Route Example

// src/routes/blog/[slug].svelte
<script context="module">
  export async function load({ params }) {
    const { slug } = params;
    // Fetch blog post data based on slug
  }
</script>

<h1>Blog Post: {slug}</h1>

• This page retrieves data based on the slug parameter passed in the URL.

Using a Layout

// src/routes/+layout.svelte
<slot />

// src/routes/about.svelte
<h1>About Us</h1>

• The +layout.svelte file can include common elements such as navigation or footers that will be present on all pages.

Conclusion

SvelteKit's page system significantly simplifies routing and organization within your application. By leveraging the file structure, you can effectively manage static and dynamic routes, layouts, and nested routes, making the framework both beginner-friendly and intuitive.