> For the complete documentation index, see [llms.txt](https://johnkazer.gitbook.io/core-web-dev-concepts/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://johnkazer.gitbook.io/core-web-dev-concepts/app.md).

# App

- [Design](https://johnkazer.gitbook.io/core-web-dev-concepts/app/design.md)
- [JavaScript](https://johnkazer.gitbook.io/core-web-dev-concepts/app/javascript.md)
- [Code design paradigms](https://johnkazer.gitbook.io/core-web-dev-concepts/app/code-design-paradigms.md)
- [State and Props](https://johnkazer.gitbook.io/core-web-dev-concepts/app/state.md)
- [JSON](https://johnkazer.gitbook.io/core-web-dev-concepts/app/json.md)
- [HTML templating](https://johnkazer.gitbook.io/core-web-dev-concepts/app/pug.md)
- [Testing](https://johnkazer.gitbook.io/core-web-dev-concepts/app/testing.md)