What is Angular, SPA Concept, Tools Setup

 

🔶 What is Angular?

  • Angular is a TypeScript-based open-source front-end web application framework developed by Google.

  • It's used to build Single Page Applications (SPAs) that are fast, dynamic, and scalable.

  • It provides everything you need to build modern web apps: components, routing, services, forms, HTTP, animations, etc.

✅ Angular is a complete framework — unlike libraries like React or jQuery.

🧩 Key Features of Angular

  • Component-based architecture

  • Two-way data binding

  • Dependency Injection

  • TypeScript support

  • Built-in routing and HTTP client

  • Reactive forms and Observables (RxJS)

  • CLI tooling for scaffolding and testing

🌐 What is an SPA (Single Page Application)?

  • An SPA is a web application that loads a single HTML page and dynamically updates the content without reloading the page.

  • Angular handles routing within the browser, so navigating between pages feels instant.

✅ Example:

  • Gmail, Google Docs, Facebook are all SPAs.

🛠 Tools Setup for Angular Development

Here’s what you need to get started:

✅ 1. Install Node.js

      

Download









  • Verify:

node -v


npm -v



✅ 2. Install Angular CLI

npm install -g @angular/cli
Verify

ng version



✅ 3. Create First Angular App
ng new my-first-app
cd my-first-app
ng serve
Visit: http://localhost:4200

✅ 4. Install a Code Editor

  • Use Visual Studio Code

  • Install Angular extensions like:

    • Angular Language Service

    • ESLint

    • Prettier

🎯 Summary of Day 1

TopicDescription
AngularComplete framework for building SPAs
SPALoads one page and dynamically updates it
ToolsNode.js, Angular CLI, VS Code
First AppCreated using ng new and ng serve

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