Styled-components

styled-components revolutionizes how developers write CSS by bringing styling directly into JavaScript components. Instead of managing separate stylesheet files and class names, you define styles as JavaScript template literals that generate actual React components with encapsulated styling.

This library eliminates common CSS headaches like naming conflicts, unused styles, and specificity wars by automatically generating unique class names and scoping styles to components. The approach enables dynamic styling based on props, making it trivial to create themeable, responsive interfaces that adapt to application state without conditional class name juggling.

Built with developer experience in mind, styled-components supports critical CSS extraction for server-side rendering, automatic vendor prefixing, and seamless integration with TypeScript for type-safe styling. The template literal syntax preserves CSS familiarity while unlocking JavaScript's full power for style composition and reusability.

With over 41,000 GitHub stars and production use by major companies, styled-components has become the industry standard for CSS-in-JS, offering a mature ecosystem with extensive tooling support, IDE extensions, and a thriving community of contributors.