Styled-components is one of the longest-lived CSS-in-JS frameworks. It’s geared to React (although there are efforts to use it elsewhere) and primarily concerned with styling React components.

CSS-in-JS is yet another form of colocation used by frameworks like React which use JavaScript render functions instead of templates. As Evan Czaplicki , Elm’s creator, posited in Twitter ...

This would be most CSS-in-JS libraries designed specifically for React today - like styled-components, styled-jsx, react-native-web. NOTE: Make sure you read the section “When to Insert <style ...