How to scale CSS in micro frontends (without losing your mind)

Micro frontend architecture allows developers to build separate parts of a frontend application independently, enhancing team autonomy. However, scaling CSS across these independent pieces presents challenges such as conflicting styles, redundant code, and bloated bundles. To address these issues, the article discusses strategies like using design tokens for consistent UI elements, CSS Modules for scoped styling, and the Shadow DOM to prevent style collisions. Design tokens act as shared variables for design decisions, while CSS Modules and the Shadow DOM offer methods to maintain isolated and predictable styles in micro frontends. These techniques ensure that each component can maintain its unique styles without interfering with others, preserving the visual integrity of the application.