# Page Not Found

The URL `js/react/all/next/preapprouter/api` does not exist.

You might be looking for one of these pages:
- [Api Routes](https://openai.gitbook.io/code-cheatsheets/react/next/preapprouter/api.md)
- [Route Handlers](https://openai.gitbook.io/code-cheatsheets/react/next/api.md)
- [PreAppRouter](https://openai.gitbook.io/code-cheatsheets/react/next/preapprouter.md)
- [Head](https://openai.gitbook.io/code-cheatsheets/react/next/preapprouter/head.md)
- [Layouts](https://openai.gitbook.io/code-cheatsheets/react/next/preapprouter/layouts.md)

## How to find the correct page

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

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/code-cheatsheets/react/next/preapprouter/api.md`)
- Use `Accept: text/markdown` header for content negotiation