How were modules isolated in microfrontends, how was communication between modules organized, and how was state managed?

In micro-frontends, module isolation is achieved through:

• Using separate builds and independent bundles for each module.
• Isolating styles with CSS modules or Shadow DOM to avoid conflicts.
• Clear delineation of responsibilities and APIs for interaction.

Communication between modules is organized via:

• Event mechanisms (Custom Events) for message passing between independent parts.
• Shared services or event buses that act as intermediaries.
• Using global state through state managers (e.g., Redux, Zustand) if data synchronization is required.

State management:

• Each micro-frontend manages its own local state.
• Centralized solutions with limited access are used for global state.
• To synchronize state between modules, subscriptions to events or shared stores with clearly defined interfaces are used.

This approach allows maintaining development and deployment independence of modules while ensuring necessary communication and data consistency.