Static extraction CSS-in-JS libraries comparison

Overview

This comparison only features CSS in JS libraries that support static extraction.

The goal is to implement the same UI-Kit in each library (with no add-ons). My understanding of a UI-Kit is a set of components consuming a theme.

Each UI-Kit must include:

a Button component with:
- variants: primary, secondary
- styles for pseudo-classes: :hover, :disabled
a color palette with two colors
a Stack component that:
- displays children horizontally on desktop, and vertically on mobile
utility function to create a gradient