Suggest an editImprove this articleRefine the answer for “What are the responsibilities of Model, View, and Controller?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)In the **MVC (Model-View-Controller)** pattern, each part of the system has **strictly defined responsibilities** so the application stays clear, flexible, and manageable. **Key point:** the Controller manages the process, the Model performs the business logic and data work, and the View shows the result - each component is responsible only for its own task.Shown above the full answer for quick recall.Answer (EN)ImageIn the **MVC (Model-View-Controller)** pattern, each part of the system has **strictly defined responsibilities** so the application stays clear, flexible, and manageable. --- ### **1. Model** - *application data and logic* **Responsibilities:** - Stores and manages data (for example, users, orders, products). - Implements the system's **business rules** and behavior. - Handles requests from the controller: "save", "change", "find". - Notifies the view about data changes (in some implementations). *Example:* A `User` class with `register()`, `login()`, `change_password()` methods and a `users` table in the database. --- ### **2. View** - *displaying data to the user* **Responsibilities:** - Receives data from the model (through the controller). - Builds the interface (HTML, JSON, an application window, a graphical element). - Displays the result of the user's actions. - Contains no processing or storage logic, only visualization. *Example:* An HTML template of a user profile, a cart page, a PDF report, a React component. --- ### **3. Controller** - *connecting link and control logic* **Responsibilities:** - Accepts user actions (a request, a click, a form input). - Turns to the model to perform the needed action. - Passes data to the view for display. - Determines which view to use for the response. *Example:* The method `UserController.show(id)` gets the user from `UserModel` and passes it to the `profile.html` template. --- ### **Overall structure of the work:** ```javascript User → Controller → Model → View → User ``` - **Controller**: manages the process. - **Model**: performs business logic and data work. - **View**: shows the result. --- **Main principle:** > Each component is responsible only for its own task. > The controller manages, the model knows how to work, and the view knows how to show.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.