It's only a react component (not a full style manager). It has more interactive states and state hooks than CSS, JSS or Radium for better control of interactive styles and functionality. It provides hover, hoverActive, touchActive, keyActive, as well as a focus state that can be styled based if it's entered fromTab, fromTouch, or fromMouse. And more...
GitHub repo & docs: https://github.com/rafrex/react-interactive