CSS-in-JS provides a syntax for turning your JavaScript into styles the browser can apply. Regardless of the framework you use, the result will look something like Listing 1.

Other CSS-in-JS libraries such as JSS, Emotion, and Styled Components are framework-agnostic, meaning that you can use them with any component-based framework or even plain JavaScript.

Frank Yan discussed at React Conf some of the technologies and strategies powering FB5, the new facebook.com, addressing topics such as Facebook’s approach to CSS-in-JS.

Unlike the JavaScript version of the CSS trigonometric functions, the CSS functions accept both angles and radians for the argument.