History Mode & the 404 Page

• The router uses history mode by default (clean URLs like /blog/hello). If the browser lacks the History API it falls back to hash mode (/#/blog/hello).
• History mode needs the server to serve index.html for unknown paths — see Build & Deploy for host configuration.
• Add a not-found.html at the root of your project's src/ directory and it becomes the default 404 page, rendered whenever no route matches. Without it, an unmatched URL renders a plain "Page Not Found!" text in the app root.

Dynamic segments

Multiple dynamic segments in one path work — /users/[id]/posts/[postId]/page.html matches /users/5/posts/10, and params() returns both values. When a URL could match both a static and a dynamic route, the static route wins.