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Angular

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Description #

Angular is a full-featured, component-based web application framework developed and maintained by Google. It allows developers to build dynamic, scalable single-page applications (SPAs) using TypeScript, HTML, and CSS, with built-in support for routing, forms, and state management.

History #

Angular (often referred to as Angular 2+) was released in 2016 as a complete rewrite of the original AngularJS (2010). It was developed by the Angular Team at Google to address performance and maintainability issues in large-scale applications. Today, Angular powers enterprise apps and progressive web applications around the world.

Hello World Code #

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

@Component({
  selector: 'app-root',
  template: '<h1>Hello, World!</h1>',
})
export class AppComponent {}

To run this code, you’d place it inside an Angular component and render it via the root module.

How to Run #

Option 1: Online

Option 2: Local

Install Angular CLI:

npm install -g @angular/cli

Create a new project:

ng new hello-world
cd hello-world
ng serve

Edit app.component.ts to include the Hello World code

    Key Concepts #

    1. Component-based architecture
    2. TypeScript-first framework
    3. Two-way data binding
    4. Dependency injection
    5. Built-in router and forms support
    6. Ahead-of-Time (AOT) compilation
    7. RxJS for reactive programming
    8. CLI tools for scaffolding
    9. Unit testing with Jasmine and Karma
    10. Enterprise-scale structure and best practices

    Try It Online #

    Fun Facts #

    • Angular is used by Google, Microsoft, and many Fortune 500 companies.
    • AngularJS (v1) and Angular (v2+) are two distinct frameworks.
    • Angular supports internationalization and accessibility out of the box.

    Resources #

    Updated on June 9, 2025

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