Angular 

Angular is a popular open-source front-end web application framework developed by Google. It is used for building dynamic and interactive web applications. Angular follows the Model-View-Controller (MVC) architecture and provides a way to structure and organize code in a clean and maintainable manner.

Key Features of Angular:

• Two-way data binding: Angular provides two-way data binding, which means any changes made in the model reflect in the view and vice versa. This simplifies the process of updating the user interface based on changes in the underlying data.
• Directives: Directives in Angular allow you to extend HTML with custom attributes and elements. They are used to create reusable components, such as custom buttons, sliders, or dialogs, and provide a way to manipulate the DOM dynamically.
• Dependency Injection: Angular uses dependency injection to provide components with their dependencies. This makes components more modular, testable, and reusable by allowing them to be easily replaced or mocked during testing.
• Services: Services in Angular are used to encapsulate reusable logic and data that can be shared across different components. They help in keeping the codebase clean and promote separation of concerns.
• Routing: Angular provides a powerful routing mechanism that allows you to define navigation paths and load different components based on the URL. This helps in creating single-page applications with multiple views.
• Forms: Angular comes with built-in form handling capabilities that make it easy to create and validate forms. It provides features like form controls, form groups, and form validation to manage user input effectively.

Angular Components:

In Angular, components are the building blocks of an application. Each component consists of three parts:

1. Template: The HTML code that defines the component's view.
2. Class: The TypeScript code that defines the component's behavior.
3. Metadata: Decorators that define the component's properties, such as selector, template, and styles.

Components can be nested within each other to create a hierarchical structure, with the top-level component representing the root of the application.

Angular Modules:

Modules in Angular help in organizing the application into cohesive blocks of functionality. Each Angular application has at least one root module, which is used to bootstrap the application. Additional feature modules can be created to encapsulate related components, directives, and services.

Modules are defined using the @NgModule decorator, which specifies the module's imports, declarations, providers, and bootstrap components.

Angular CLI:

The Angular Command Line Interface (CLI) is a powerful tool that helps in creating, building, and managing Angular applications. It provides commands for generating components, services, modules, and other Angular artifacts, as well as for serving and building the application.

Angular Routing:

Routing in Angular allows you to navigate between different views and components in a single-page application. You can define routes using the RouterModule and Route classes, and configure the router in the root module of the application.

Angular routing supports features like route parameters, route guards, lazy loading, and nested routes, making it easy to create complex navigation structures.

Angular Services:

Services in Angular are singleton objects that are used to encapsulate business logic, data access, and other reusable functionality. Services can be injected into components using Angular's dependency injection system, making them easy to use and test.

Angular Forms:

Angular provides powerful form handling capabilities that make it easy to create and validate forms. You can create forms using template-driven or reactive form approaches, and add form controls, validators, and custom validation logic.

Angular forms support features like form groups, form arrays, form controls, form validation, and form submission, allowing you to build complex forms with ease.

Conclusion:

Angular is a robust and feature-rich front-end framework.