Atro Build: 404.Astro only handles paths with the pathname https://example.com/404, rather than all non-existing paths.

[karannakra]

Astro Info

Astro                    v4.2.6
Node                     v18.18.2
System                   macOS (arm64)
Package Manager          npm
Output                   static
Adapter                  none
Integrations             @astrojs/react

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

Create 2 pages

1. 404.astro
2. index.astro

Now, try entering a path for a page that does not exist. In development mode, 404 handles all unknown paths. However, while running with Astro preview, only 404 is captured.

The 404.astro page only captures routes with the pathname 404, although it should capture all pathnames for which the path does not exist. It was working great in Astro 3. When I switched to Astro 4, this fault appeared.

Steps to reproduce the bug

1. Run astro build
2. Run astro preview
3. Go to some unknown path

What's the expected result?

404 should catch all pathnames to pages that do not exist. It works properly in development mode. It does not work after astro build and astro preview.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-vf7clf?file=src%2Fpages%2F404.astro,src%2Fpages%2Findex.astro

Participation

• I am willing to submit a pull request for this issue.