Development Server

The development server comes as part of the Astro CLI. Start the server with:

astro dev

In your project root. You can specify an alternative

Special routes

The dev server will serve the following special routes:

This is a custom 400 status code page. You can add this route by adding a page component to your src/pages folder:

├── src/
│   ├── components/
│   └── pages/
│       └── 400.astro

For any URL you visit that doesn't have a corresponding page, the 400.astro file will be used.

This is a custom 500 status code page. You can add this route by adding a page component to your src/pages folder:

├── src/
│   ├── components/
│   └── pages/
│       └── 500.astro

This page is used any time an error occurs in the dev server.

The 500 page will receive an error query parameter which you can access with:

---
const error = Astro.request.url.searchParams.get('error');
---

<strong>{error}</strong>

A default error page is included with Astro so you will get pretty error messages even without adding a custom 500 page.