They generate locally scoped class names that are easy to reason about, without introducing complex conventions.
styled-jsx is a library to support CSS-in-JS. It was developed by Zeit for use in their awesome Next.js (React) apps.
Emotion is a performant and flexible CSS-in-JS library. Building on many other CSS-in-JS libraries, it allows you to style apps quickly with string or object styles. It has predictable composition to avoid specificity issues with CSS. With source maps and labels, Emotion has a great developer experience and great performance with heavy caching in production.
Radium is a set of tools to manage inline styles on React elements. It gives you powerful styling capabilities without CSS.
Glamorous is React component styling solved with an elegant (inspired) API, small footprint (<5kb gzipped), and great performance (via glamor).
The rich text element allows you to create and format headings, paragraphs, blockquotes, images, and video all in one place instead of having to add and format them individually. Just double-click and easily create content.
A rich text element can be used with static or dynamic content. For static content, just drop it into any page and begin editing. For dynamic content, add a rich text field to any collection and then connect a rich text element to that field in the settings panel. Voila!
Headings, paragraphs, blockquotes, figures, images, and figure captions can all be styled after a class is added to the rich text element using the "When inside of" nested selector system.