Angular Introduction

Angular is a full framework for building web applications. It helps you build large, maintainable apps with a clear structure, routing, forms, HTTP, and strong tooling.

What is Angular?

Angular helps you:

• Build UI using components (small reusable pieces)
• Manage app screens using routing
• Handle user input using forms
• Call APIs using HttpClient
• Keep code organized using services and dependency injection

If React is a library for UI, Angular is a whole toolbox for building full apps in a consistent way.

When Angular is a great choice

Angular shines when:

• You have a big app with many screens
• Multiple developers work together (consistency matters)
• You want a strong structure and best practices from day one
• You want TypeScript-first development

Angular mental model (quick picture)

flowchart LR
  User((User)) --> UI[Components + Templates]
  UI --> State[Component State]
  UI --> Router[Router: pages]
  UI --> Services[Services: business logic]
  Services --> API[Backend API]
  Services --> Store[(Optional State Store)]

Your first Angular “Hello”

Angular components look like this:

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

@Component({
  selector: 'app-hello',
  standalone: true,
  template: `<h1>Hello, Angular!</h1>`,
})
export class HelloComponent {}

What you should learn first

1. Components + Templates
2. Data binding (showing data, handling clicks)
3. Directives (*ngIf, *ngFor)
4. Services + HTTP
5. Routing
6. Forms (Template-driven, then Reactive)

Next: Install Angular CLI and create your first app.