How Feature-Based BLoC Architecture Helps Flutter Apps Scale in Production

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As Flutter applications grow in complexity, basic state management structures often lead to tightly coupled code and testing difficulties. A feature-based BLoC architecture addresses this by organizing code around distinct features, each with separate data, domain, and presentation layers. The pattern introduces a clear layered flow — UI, BLoC, Use Case, Repository, and Data Source — where each layer has a single, focused responsibility. BLoCs coordinate state transitions using explicit events and meaningful state classes, while remaining independent of HTTP or database implementation details. Repository interfaces further decouple business logic from data sources, making unit testing and future refactoring significantly easier.

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ProgrammingDEV Community ·

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