What is Feature-Sliced Design and what problem does the architecture as a whole solve?

Feature-Sliced Design is a frontend architecture methodology aimed at organizing code by feature slices rather than by technical layers (e.g., components, services, utilities). The main idea is to break the application into independent, isolated parts, each responsible for a specific business function.

The problem this architecture solves is the complexity of scaling and maintaining large applications. With traditional architecture, the code quickly becomes tangled, dependencies grow, and it becomes difficult to understand where everything is. Feature-Sliced Design helps to:

• Improve modularity and reusability of code.
• Make dependencies transparent and controllable.
• Facilitate teamwork by dividing responsibilities by features.
• Simplify testing and maintenance.

Example structure:

src/
  app/           # global settings and configurations
  shared/        # common utilities and components
  entities/      # business entities (e.g., user, product)
  features/      # specific features (e.g., authorization, cart)
  pages/         # application pages

Thus, Feature-Sliced Design helps create a more resilient and understandable frontend architecture.