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Introduction to Angular

What is Angular?

Angular is a platform and framework for building single-page client applications using HTML and TypeScript. It is developed and maintained by Google and is designed to make both the development and testing processes easier.

Angular is a complete rewrite from the same team that built AngularJS.

Key Features

  • Component-based architecture
  • Dependency injection
  • Two-way data binding
  • Routing
  • RxJS for reactive programming

Angular Architecture

Angular is built on a modular architecture, and its core components include:

  1. Modules: Containers for a cohesive block of code dedicated to an application domain, a workflow, or a closely related set of capabilities.
  2. Components: The building blocks of Angular applications. A component controls a patch of screen called a view.
  3. Templates: Define the view for a component. They are written in HTML and can include Angular directives.
  4. Services: Used to share data and functionality across components.

Getting Started

Step 1: Install Angular CLI

npm install -g @angular/cli

Step 2: Create a new Angular project

ng new my-angular-app

Step 3: Run the Angular application

cd my-angular-app
ng serve --open

Best Practices

When developing applications with Angular, consider the following best practices:

  • Use Angular CLI for project scaffolding.
  • Keep components small and focused.
  • Use services for business logic and data handling.
  • Leverage observables for handling asynchronous data.
  • Write unit tests for components and services.

FAQ

What is the difference between Angular and AngularJS?

AngularJS is the original version of the framework, built using JavaScript. Angular (Angular 2+) is a complete rewrite of AngularJS, built using TypeScript and offers a more modern approach to web development.

Is Angular suitable for large applications?

Yes, Angular is designed for building scalable web applications and is widely used in enterprise-level applications.

What is TypeScript?

TypeScript is a superset of JavaScript that adds static types. Angular is built using TypeScript, which helps catch errors early in the development process.