How to Fix SvelteKit Routing Error Quickly and Easily

SvelteKit routing errors usually happen because the file or folder structure under src/routes does not match the expected route pattern. To fix this, ensure your route files use correct names and extensions like +page.svelte and that dynamic routes use square brackets, e.g., [id].

Why This Happens

SvelteKit uses your src/routes folder to create routes automatically. If you name files or folders incorrectly, or forget the required +page.svelte suffix, SvelteKit cannot find the route and throws an error. Also, dynamic routes must be wrapped in square brackets, like [slug]. Missing or wrong naming breaks routing.

plaintext

src/routes/about.svelte

<script>
  // This is incorrect because the file should be named +page.svelte inside an about folder
</script>

<h1>About Page</h1>

Output

Error: Cannot find module for route /about

The Fix

Rename your route files to follow SvelteKit conventions. For example, create a folder named about inside src/routes and place a file named +page.svelte inside it. For dynamic routes, use square brackets around the parameter name. This tells SvelteKit how to map URLs to components correctly.

svelte

src/routes/about/+page.svelte

<script>
  // Correct route file
</script>

<h1>About Page</h1>

Output

<h1>About Page</h1> rendered at /about route

Prevention

Always follow SvelteKit's routing file conventions: use +page.svelte for pages, +layout.svelte for layouts, and square brackets for dynamic segments. Use your editor's file explorer to double-check folder structure. Enable linting tools that check route file names and extensions to catch mistakes early.

Related Errors

Other common routing errors include missing +page.svelte files causing 404s, incorrect dynamic parameter names causing route mismatches, and conflicts between static and dynamic routes. Fix these by verifying file names and avoiding overlapping route patterns.

Key Takeaways

SvelteKit routing depends on correct file and folder names under src/routes.

Use +page.svelte files inside folders named after the route path.

Wrap dynamic route parameters in square brackets like [id].

Lint your project to catch routing naming errors early.

Avoid overlapping static and dynamic route names to prevent conflicts.