Enterprise Micro Frontends: Scaling Large React Applications with Module Federation & Edge Streaming

Module Federation dynamically resolves dependencies and remote components at runtime over HTTP. Unlike sluggish iframes or complex npm package versioning, micro frontends share a single React runtime in browser memory while retaining completely independent CI/CD release cycles.

Maintaining visual consistency across decentralized teams is paramount. We architect a centralized design token package (CSS variables and headless components) that remote micro apps consume, guaranteeing zero styling regressions between modules.

Micro frontends should be loosely coupled. We establish event driven communication using custom browser CustomEvents or lightweight shared Zustand stores for cross cutting concerns like user authentication tokens and global notifications.

If an individual remote micro frontend goes down, the host application must not crash. Wrapping every remote entry point with robust React Error Boundaries and edge level fallbacks ensures 99.99% application uptime for end users.