# Page Not Found

The URL `contact.php` does not exist.

You might be looking for one of these pages:
- [Constructor Pattern (ok)](https://javascriptuse.gitbook.io/advanced/constructor-pattern.md)
- [Quick start graphql (ok)](https://javascriptuse.gitbook.io/advanced/quick-start-graphql.md)
- [Prototype (ok)](https://javascriptuse.gitbook.io/advanced/prototype.md)
- [Command (ok)](https://javascriptuse.gitbook.io/advanced/command.md)
- [State (ok)](https://javascriptuse.gitbook.io/advanced/state.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://javascriptuse.gitbook.io/advanced/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://javascriptuse.gitbook.io/advanced/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/advanced/constructor-pattern.md`)
- Use `Accept: text/markdown` header for content negotiation