> For the complete documentation index, see [llms.txt](https://engine.sygnal.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://engine.sygnal.com/usage/useful-library-additions/adding-libraries.md).

# Adding Libraries

One of the huge advantages of this setup is that you can now easily tap into a huge range of 3rd party library functionality, and it will all be bundled directly into your Site Engine codebase.

For example; 

## GSAP

```
npm install gsap
```

## JS Cookie

```
npm install js-cookie
```

## Luxon

For any form of Datetime math you need to do in your site. 

## FlatPickr

For a date-entry UI