> For the complete documentation index, see [llms.txt](https://jakekwak.gitbook.io/nestjs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jakekwak.gitbook.io/nestjs/fundamentals.md).

# FUNDAMENTALS

- [Custom providers](https://jakekwak.gitbook.io/nestjs/fundamentals/untitled.md)
- [Asynchronous providers](https://jakekwak.gitbook.io/nestjs/fundamentals/asynchronous-providers.md)
- [Dynamic modules](https://jakekwak.gitbook.io/nestjs/fundamentals/dynamic-modules.md)
- [Circular dependency](https://jakekwak.gitbook.io/nestjs/fundamentals/circular-dependency.md)
- [Injection scopes](https://jakekwak.gitbook.io/nestjs/fundamentals/injection-scopes.md)
- [Lifecycle Events](https://jakekwak.gitbook.io/nestjs/fundamentals/lifecycle-events.md)
- [Platform agnosticism](https://jakekwak.gitbook.io/nestjs/fundamentals/platform-agnosticism.md)
- [Testing](https://jakekwak.gitbook.io/nestjs/fundamentals/testing.md)