Explain Feature-Sliced Design (FSD). How did you apply it in a project?

Feature-Sliced Design (FSD) is a methodology for organizing frontend code, focused on dividing the project into functional slices (features), rather than technical layers.

Main ideas of FSD:

• The project is divided into independent features, each containing everything necessary: UI, logic, styles.
• Within a feature, layers can be distinguished (e.g., api, model, ui), but they are within the context of a specific feature.
• This facilitates scaling, support, and reusing code.

In practice, I applied FSD as follows:

• I divided the application into features based on business logic (e.g., user profile, news feed).
• In each feature, I stored components, hooks, styles, and API requests related to it.
• This allowed quickly finding the needed code and minimizing dependencies between features.

Example structure:

src/
  features/
    profile/
      ui/
      model/
      api/
    feed/
      ui/
      model/
      api/