Comparing the top zero-runtime CSS-in-JS libraries

CSS-in-JS is a popular styling technique that allows developers to define styles within JavaScript files, offering benefits such as easy code sharing, reduced DOM load, and enhanced error handling. This method is particularly favored in modern component-based frameworks like React and Angular. While writing CSS-in-JS can be challenging due to its inline nature and potential performance costs from double parsing, zero-runtime libraries like Linaria, Astroturf, Reshadow, vanilla-extract, Treat, and Goober provide solutions by extracting styles into separate CSS files at build time, improving performance. Each library offers unique features, such as dynamic theming, type safety, and integration with existing tools, though they may also present challenges like setup complexity and documentation gaps. Despite these hurdles, the future of CSS-in-JS remains promising, especially in large-scale or collaborative projects.