Angular - Tutorial

What is Angular?

Angular is a free and open-source web application framework based on TypeScript. It’s widely used for building single-page applications (SPAs). Developed by Google, Angular is a component-based framework that helps in creating scalable web applications. It comes with a comprehensive set of tools and libraries to streamline the development, testing, and deployment processes, enabling developers to build fast and reliable apps.

Why Use Angular?

• Two-Way Data Binding : Keeps the model and view in sync, reducing extra code and simplifying DOM updates.
• Component-Based Architecture : Builds applications using reusable components, making them modular, easy to maintain, and test.
• Dependency Injection (DI) : Simplifies managing services and enhances testing and reuse.
• Built-in Features : Angular offers key features like.
  • Routing: For navigating between pages.
  • HTTP Client: For API communication.
  • Form Handling: Supports template-driven and reactive forms.
  • State Management: Eases application state handling.
• Testing Support : Provides tools for unit testing (Karma, Jasmine) and end-to-end testing (Protractor, Cypress), making testing easier.

What is Single Page Application (SPA)?

A Single Page Application (SPA) is a web app that loads a single HTML page and dynamically updates the page as users interact with it. SPAs use Ajax and HTML5 to offer a seamless, fluid experience without constant page reloads.

Prerequisites to Learn Angular

• HTML, CSS and JavaScript.
• Basic understanding of TypeScript.
• Basic knowledge of web development.

Example

app.component.ts

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

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrl: './app.component.css'
})
export class AppComponent {
  title = 'Hi, Hello World';
}

app.component.html

<h3>{{title}}</h3>
<p>Welcome to myapp!</p>

Output

Next