⚙️ AngularJS Environment Setup & First Application (2025 Guide)
🧲 Introduction – Why Set Up AngularJS?
To start building with AngularJS, the first step is setting up your development environment and creating your very first application. AngularJS offers a simple and fast setup process—ideal for both beginners and experienced JavaScript developers.
Whether you’re maintaining a legacy AngularJS app or exploring the fundamentals of JavaScript frameworks, this guide walks you through everything you need to set up, run, and understand your first AngularJS project.
🎯 In this guide, you’ll learn:
- How to set up AngularJS in your environment
- Different ways to include AngularJS in a project
- How to write your first AngularJS application
- Line-by-line breakdown of the code
🧰 Prerequisites
Before getting started, make sure you have:
- A code editor like Visual Studio Code, Sublime Text, or Atom
- A web browser (preferably Chrome or Firefox)
- Basic knowledge of HTML and JavaScript
🌐 Step 1: Include AngularJS in Your Project
You can include AngularJS in two ways:
📦 Option 1: Use CDN (Recommended for Beginners)
Add this inside your <head> or right before closing </body>:
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"></script>
💾 Option 2: Download AngularJS Locally
- Visit https://angularjs.org
- Click Download AngularJS
- Save
angular.min.jsto your project directory - Reference it like this:
<script src="angular.min.js"></script>
📁 Step 2: Create Folder Structure
Create a project folder named angularjs-app:
angularjs-app/
│
├── index.html
├── app.js (optional for controller logic)
└── angular.min.js (if using local file)
🧪 Step 3: Write Your First AngularJS Application
📝 index.html
<!DOCTYPE html>
<html lang="en" ng-app="myApp">
<head>
<meta charset="UTF-8">
<title>My First AngularJS App</title>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<h2>{{ greeting }}</h2>
<p>Enter your name: <input ng-model="name"></p>
<p>Hello, {{ name }}!</p>
</body>
</html>
🧾 Line-by-Line Explanation:
ng-app="myApp"initializes the AngularJS application.ng-controller="MainCtrl"binds the scope to the controller.{{ greeting }}and{{ name }}are AngularJS expressions to display data.ng-model="name"binds the input field to the model.
⚙️ app.js
var app = angular.module('myApp', []);
app.controller('MainCtrl', function($scope) {
$scope.greeting = "Welcome to AngularJS!";
});
🧾 Line-by-Line Explanation:
angular.module('myApp', []): creates a new AngularJS module..controller('MainCtrl', function($scope) { ... }): defines a controller.$scope.greeting: holds the message shown in the HTML view.
🚀 Step 4: Run Your AngularJS App
You can open index.html directly in a browser. No server setup is required.
👉 For a better development experience:
- Use a Live Server extension in VS Code.
- Or run a local server using Python/Node if needed.
✅ Expected Output
When you open the page:
- A heading saying: Welcome to AngularJS!
- An input box where you enter your name.
- A live-updating message: Hello, [Your Name]!
📌 Summary – Recap & Next Steps
Setting up AngularJS is incredibly easy—no build tools, bundlers, or compilation required. Just a script tag, a controller, and you’re ready to build dynamic web apps with two-way binding and modular architecture.
🔍 Key Takeaways:
- You can set up AngularJS using a CDN or local copy
- Apps are initialized using
ng-appandng-controller - Data binding makes the UI dynamic with minimal code
⚙️ Real-world Relevance:
Learning the setup and basic structure of AngularJS apps is crucial for developers maintaining enterprise portals or migrating apps to newer frameworks like Angular or React.
❓ FAQ – AngularJS Setup & First App
❓ Do I need a build tool like Webpack for AngularJS?
✅ No. AngularJS apps run directly in the browser and don’t require build tools.
❓ What is the use of ng-app?
✅ It tells AngularJS where the application starts and bootstraps the app module.
❓ Why is ng-model important?
✅ It creates a two-way binding between input elements and the model, allowing dynamic UI updates.
❓ Can I use AngularJS with modern frameworks?
✅ While AngularJS can coexist with other libraries, it’s usually used standalone or maintained in legacy projects.
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