1. Model
The Model component in the MVC (Model-View-Controller) design pattern represents the data and business logic of an application. It is responsible for managing the application’s data, processing business rules, and responding to requests for information from other components, such as the View and the Controller.
2. View
Displays the data from the Model to the user and sends user inputs to the Controller. It is passive and does not directly interact with the Model. Instead, it receives data from the Model and sends user inputs to the Controller for processing.
3. Controller
Controller acts as an intermediary between the Model and the View. It handles user input and updates the Model accordingly and updates the View to reflect changes in the Model. It contains application logic, such as input validation and data transformation.
Communication between the components
This below communication flow ensures that each component is responsible for a specific aspect of the application’s functionality, leading to a more maintainable and scalable architecture
- User Interaction with View:
- The user interacts with the View, such as clicking a button or entering text into a form.
- View Receives User Input:
- The View receives the user input and forwards it to the Controller.
- Controller Processes User Input:
- The Controller receives the user input from the View.
- It interprets the input, performs any necessary operations (such as updating the Model), and decides how to respond.
- Controller Updates Model:
- The Controller updates the Model based on the user input or application logic.
- Model Notifies View of Changes:
- If the Model changes, it notifies the View.
- View Requests Data from Model:
- The View requests data from the Model to update its display.
- Controller Updates View:
- The Controller updates the View based on the changes in the Model or in response to user input.
- View Renders Updated UI:
- The View renders the updated UI based on the changes made by the Controller.