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AngularJS Tutorial

Last Updated : 21 Mar, 2024
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AngularJS, developed by Google, is a powerful open-source front-end framework that enables developers to build dynamic and responsive single-page web applications (SPAs). AngularJS is an open-source JavaScript framework that extends HTML DOM with additional attributes for a more responsive user experience. It is licensed under the Apache license version 2.0 and used by thousands of developers worldwide. Overall, AngularJS is a framework to build large-scale, high-performance, and easy-to-maintain web applications.

AngularJS Tutorial

This AngularJS tutorial is designed to learn AngularJS in a quick and efficiently. You will start by learning the fundamentals of AngularJS, including directives, expressions, filters, modules, and controllers. After that, you will learn about a variety of other aspects of AngularJS, such as events, DOM, forms, input, validation, HTTP, and more.

Additionally, we also provide AngularJS interview questions to help you deepen your understanding of the framework and prepare for potential job opportunities.

AngularJS Prerequisites:

Why to Learn AngularJS?

AngularJS is an open-source web application framework, was initially developed in 2009 by Misko Hevery and Adam Abrons. It is now maintained by Google, and its latest version is 1.2.21.

  • Established Framework: AngularJS has been around for a long time and is used in many popular web applications. This means there’s a large community of developers and a wealth of resources available to help you learn and troubleshoot
  • Single Page Applications (SPAs): AngularJS excels at building SPAs, which provide a more fluid and responsive user experience. If you’re looking to create a dynamic and interactive web application, AngularJS is a good option.
  • Structure and Maintainability: By using the Model-View-Controller (MVC) architecture, AngularJS enforces a clean separation of concerns, which can lead to more maintainable and scalable code. This can be especially beneficial for complex applications.
  • Large Development Community: With its long history, AngularJS has a vast community of developers. This means you’ll have access to forums, tutorials, and other resources to help you learn and solve problems.

Key Concepts in AngularJS

1. MVC Architecture

AngularJS follows the Model-View-Controller (MVC) architectural pattern, which divides the application logic into three interconnected components:

  • Model: Represents the data and business logic.
  • View: Handles the presentation and user interface.
  • Controller: Manages communication between the Model and the View.

2. Two-Way Data Binding

One of AngularJS’s standout features is its two-way data binding. Changes in the user interface automatically update the underlying data model and vice versa. This simplifies data synchronization between the view and the model, reducing the need for manual manipulation.

3. Directives

Directives are markers in the DOM that instruct AngularJS to attach specific behavior to a DOM element or transform the DOM’s structure. They enhance HTML with new functionalities and enable the creation of reusable components. Common directives include ng-modelng-repeat, and ng-if.

4. Services

AngularJS provides a set of built-in services that offer common functionalities, such as HTTP requests, routing, and more. Developers can also create custom services to encapsulate specific features and share them across different components.

5. Dependency Injection

Dependency Injection (DI) is a design pattern used in AngularJS, allowing components to be loosely coupled. This enhances modularity and simplifies testing.

Advantages of AngularJS

  • Easy to work with: All you need to know to work with AngularJS is basics of HTML,CSS and JavaScript, not necessary to be an expert in these technologies.
  • Time-saving: AngularJS allows us to work with components and hence we can use them again which saves time and unnecessary code.
  • Ready to use template: AngularJS is mainly plain HTML, and it mainly makes use of the plain HTML template and passes it to the DOM and then the AngularJS compiler. It traverses the templates and then they are ready to use.

Create Your First AngularJS Application

Let’s create a simple AngularJS application that displays a list of subjects. Follow these steps:

  1. Setting Up AngularJS:
    • Download AngularJS or include it via a CDN.
    • Add the AngularJS script to your HTML file.
    • Create an AngularJS module using angular.module.
  2. Creating Your First AngularJS Application:
    • Define a controller using angular.module.controller.
    • Bind data to the view using ng-model.
    • Use directives like ng-repeat and ng-if.

More Related to AngularJS

Complete References

Interview Questions

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