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Micro-frontends bring microservices to your UI. Teams own specific parts. They build and ship separately. This gives teams freedom. Bad setups ruin the user experience.
Integration patterns:
- Iframes: Simple but poor UX.
- Web Components: Use custom elements.
- Module Federation: Share JS modules at runtime.
Composition types:
- Client-side: The browser loads parts separately.
- Server-side: The server builds HTML first. This is faster.
Shared dependencies are hard. Multiple React versions waste space. Use module federation or import maps to fix this.
Keep your UI consistent. Use a shared design system with web components. Use the same buttons and forms everywhere.
Do not use this by default. It adds complexity. Use it only for large teams. A structured monolith works better for most apps.
Invest in shared tools:
- Shell application.
- Deployment pipeline.
- Design system.
- Performance monitoring.