what is Angular Architecture ?

 Angular is a popular open-source web application framework maintained by Google. It provides a structured architecture for building dynamic, single-page web applications. Angular's architecture is designed to encourage best practices, modularity, and maintainability in web development. The key architectural components of an Angular application include:

1. Modules:

   - Angular applications are organized into modules, which are a way to group related components, services, and other code into cohesive units. Modules help with encapsulation and code organization.

2. Components:

   - Components are the building blocks of an Angular application. They represent the UI elements of the application and encapsulate the logic and templates for rendering views. Each component typically has a TypeScript class file and an HTML template.

3. Templates:

   - Angular templates are used to define the structure and layout of a component's view. Templates are typically written in HTML with Angular-specific syntax for data binding, directives, and event handling.

4. Directives:

   - Directives are instructions in the template that tell Angular how to modify or manipulate the DOM. Examples include structural directives like `*ngIf` and `*ngFor` for conditionally rendering or iterating over elements.

5. Services:

   - Services are used to encapsulate business logic, data retrieval, and other non-UI-related functionality. They are typically singletons and are often injected into components and other services to provide shared functionality.

6. Dependency Injection (DI):

   - Angular's DI system allows components, services, and other classes to declare their dependencies and receive them through constructor injection. This promotes loose coupling and testability.

7. Data Binding:

   - Angular supports two-way data binding, which means that changes in the model are automatically reflected in the view, and vice versa. Data binding is a core concept in Angular applications.

8. Routing:

   - Angular provides a built-in router for building single-page applications with multiple views. It allows you to define routes and associate them with components, enabling navigation within the application.

9. RxJS (Reactive Extensions for JavaScript):

   - Angular uses RxJS for handling asynchronous operations and managing data streams. Observables are a fundamental part of Angular applications and are used for handling events, HTTP requests, and more.

10. Modules and Dependency Injection:

    - Angular's module system and dependency injection facilitate the organization and separation of concerns within an application. Modules help create boundaries and manage the application's configuration.

11. Change Detection:

    - Angular has a change detection mechanism that automatically updates the view when data changes in the application. It optimizes performance by minimizing unnecessary DOM updates.

12. Pipes:

    - Pipes are used for transforming data in the template. Angular provides built-in pipes for various operations, and you can create custom pipes as well.

Overall, Angular's architecture promotes a component-based, modular structure for building scalable and maintainable web applications. It enforces best practices for separation of concerns, testability, and the efficient handling of complex applications.

Angular Installation for 14.15.1

we have Download Node 14.15.1 then we have to insert command for typescript install.

npm install -g typescript@5.2.2

then we install Angular@angular/cli@12.2.*

npm install - g @angular/cli@12.2.*