What is AngularJS?
A powerful JavaScript framework for building single-page applications (SPAs).
AngularJS is an open-source front-end JavaScript framework developed by Google. It allows developers to build dynamic, single-page web applications (SPAs) by extending HTML with new attributes and powerful data-binding capabilities.
🔹 Key Concepts
- ✅ Declarative UI: HTML with AngularJS directives like
ng-model,ng-repeat - ✅ Two-Way Data Binding: Sync between model & view automatically
- ✅ MVC Pattern: Separates data (Model), UI (View), logic (Controller)
- ✅ Directives: Custom HTML behaviors
- ✅ Dependency Injection: Makes services reusable & testable
- ✅ SPA Support: Dynamic routing without full-page reload
🔸 Why AngularJS?
- ✔️ Developed & maintained by Google
- ✔️ Best suited for interactive web apps
- ✔️ Built-in two-way binding
- ✔️ Strong community & tool ecosystem
🛠 Example: Hello AngularJS
<!DOCTYPE html>
<html ng-app>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.3/angular.min.js"></script>
</head>
<body>
<p>Enter your name: <input type="text" ng-model="name"></p>
<h2>Hello {{name}}!</h2>
</body>
</html>
In this example, AngularJS binds your input to the greeting automatically — that’s the magic of two-way data binding!


