5 things you didn’t know you can do in CSS-in-JS

CSS-in-JS is a technique that allows developers to style applications using JavaScript, addressing traditional CSS limitations such as dynamic functionality, scoping, and portability. It supports libraries like Aphrodite, styled-components, JSS, Emotion, and Radium, which enable developers to style React components more efficiently. CSS-in-JS features include the ability to target other styled components, define animations with keyframes, and declare global styles using helper components or extensions. Additionally, JSS can extend features of other libraries, like Aphrodite, to support themes, while some libraries provide utilities for testing styled components in unit tests. The approach allows for chaining multiple animations and even testing components with styles via utilities such as Aphrodite's StyleSheetTestUtils and Radium's TestMode. Despite varying capabilities across different libraries, CSS-in-JS offers innovative ways to manage styles, with some libraries like Stylable even integrating CSS, JavaScript, and types into a streamlined, cross-browser solution.