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) ```mermaid 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: ```ts 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.