Angular FAQ: Top Questions

Angular is a robust, full-featured, open-source front-end web application framework developed and maintained by Google. It is written in TypeScript and is designed for building scalable, maintainable, and modular Single Page Applications (SPAs). Angular provides a declarative approach to UI design, efficient data binding, and a rich toolset that helps streamline modern web development.

Angular promotes component-based architecture, powerful state management, and built-in features like routing, form validation, and dependency injection — all while encouraging best practices and testability.

• Component-Based:
  • The application is built as a tree of components, where each component encapsulates its HTML, logic, and styling.
  • Promotes reusability, separation of concerns, and maintainability.
• Dependency Injection (DI):
  • Angular has a powerful DI framework that allows you to inject services and other dependencies into components or other services.
  • Helps decouple modules and improves testability.
• Two-Way Data Binding:
  • Automatically synchronizes the data between the model and the view, reducing boilerplate code and keeping the UI consistent with the underlying data.
• Routing:
  • Angular includes a built-in router module to define navigation paths, parameterized routes, lazy-loaded modules, and guards.
  • Enables deep linking and client-side navigation in SPAs.
• Reactive Programming with RxJS:
  • Angular leverages RxJS (Reactive Extensions for JavaScript) for handling asynchronous events and data streams.
  • Enables developers to compose complex data flows and event handling patterns.

// app.component.ts

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: '<h1>Welcome to Angular!</h1>',
  styles: ['h1 { color: #1976d2; font-family: Arial, sans-serif; }']
})
export class AppComponent {}
        

Explanation of the Example Code:

• @Component is a decorator that marks the class as an Angular component and provides metadata about how it should be used.
• selector: 'app-root' indicates that this component can be used in HTML with the tag <app-root>.
• template defines the inline HTML structure that this component will render.
• When Angular bootstraps the application, it loads this root component and begins rendering from there.

This simple example illustrates Angular’s declarative and component-driven approach to building modern web applications.