What Is AngularJS: Tutorial, Example, Expression, Frontend, Backend

If you’re wondering about What Is AngularJS and how it is used, then this blog is just what you need to read! Learn everything you need to know about AngularJS, its examples, and how it is used here!

What is AngularJS: AngularJS, a robust JavaScript framework developed by Google, revolutionises web development by enhancing the functionality of HTML. AngularJS streamlines crafting single-page apps, making interactive, responsive user interfaces a breeze for developers.

AngularJS eases the development of scalable, maintainable web apps through features like two-way data binding, dependency injection, and modular development. Explore AngularJS, and whether you’re an experienced developer or a beginner, a realm of possibilities for crafting dynamic and efficient web solutions unfolds before you.

In this blog, we will talk about AngularJS, AngularJS fundamentals, advantages, and enhancing your path in web development.

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Table of Contents

AngularJS vs React JS

React and Angular stand out as popular JavaScript frameworks designed for constructing intricate and engaging web applications. Although they exhibit various similarities, certain unique features set them apart, establishing fundamental differences. Let’s compare the two frameworks briefly before discussing the technical aspects in detail.

AngularJS vs React JS
	Angular	React
Type	Full-fledged structural framework	JavaScript-based library
Purpose	Develop dynamic web apps	Build interactive UI components
Language	TypeScript	JavaScript (JSX script)
Developed and maintained by	Google	Meta and community
Front-end development approach	Extends the functionality of HTML, prefers client-side rendering	Utilises JSX, a syntax reminiscent of XML, and displays a slight inclination towards server-side rendering.
DOM	Real	Virtual
Performance	High	Demonstrates a higher level of performance as the virtual DOM helps in quickly showing updates, ensuring fast runtime performance.
Dynamic UI binding	UI binding at plain object or property level	Direct linking of states to the UI
App structure	Fixed and complex platform, component-based framework	Flexible, component-based
Data binding	Two-way	One-way
Dependency injection	Enables dependency injection, permitting distinct life cycles for various stores.	Doesn’t completely support dependency injection since each component has its individual global state
Learning curve	Can be steep for beginners	Relatively small
GitHub stars	86.7k	203k
Ideal use cases	Create intricate enterprise applications, advanced single-page web applications, and websites.	Modern and large web apps with frequently variable data, natively-rendered hybrid apps for Android id aOS devices

What Is AngularJS Tutorial?

Here’s a detailed AngularJS Tutorial:

Introduction to AngularJS:

Brief overview of AngularJS and its role in web development.
Grasping the Model-View-Controller (MVC) architecture.

Setting Up AngularJS:

Downloading AngularJS and adding it to your project.
Exploring the basic structure of an AngularJS application.

Building Your First AngularJS App:

Creating a simple “Hello World” application.
Introducing AngularJS directives and expressions.

Understanding Data Binding:

Explaining two-way data binding.
Connecting the model and view seamlessly.

Working with Controllers:

Creating controllers to manage application logic.
Associating controllers with specific views.

Handling User Input:

Incorporating forms and capturing user input.
Implementing validation and feedback mechanisms.

Services and Dependency Injection:

Introduction to services in AngularJS.
Understanding dependency injection for modular and scalable code.

Routing and Navigation:

Implementing client-side routing for single-page applications.
Creating navigation menus and handling route parameters.

Directives Deep Dive:

Exploring custom directives for reusable components.
Incorporating built-in directives for enhanced functionality.

Working with APIs:

Making HTTP requests using AngularJS’s $http service.
Handling API responses and updating the UI dynamically.

Testing AngularJS Applications:

Overview of unit testing using tools like Jasmine or Karma.
Writing testable and maintainable AngularJS code.

Advanced Concepts:

Exploring advanced features like filters, animations, and internationalisation.
Understanding best practices for scalable AngularJS applications.

Deployment and Optimization:

Optimising AngularJS applications for production.
Deploying the application on various hosting platforms.

Exploring AngularJS Ecosystem:

Introducing additional tools and libraries that complement AngularJS.
Connecting with the vibrant AngularJS community and resources.

Building a Complete Project:

Applying the acquired knowledge to build a comprehensive web application.
Integrating multiple AngularJS features into a cohesive project.

This stepwise AngularJS tutorial aims to guide both beginners and experienced developers through the process of mastering AngularJS for building dynamic and responsive web applications. Each step provides hands-on examples and practical insights to reinforce your understanding of this powerful JavaScript framework.

Also Read: 8 Best Android Frameworks for App Development in 2024

Features of AngularJS

AngularJS is a very versatile framework. With that being said, here are some of the features of AngularJS:

AngularJS is a free and open-source front-end framework that is used by many global web and mobile app development service providers.
The AngularJS framework is licensed under Apache License version 2.0.
AngularJS provides software developers with various options for writing client-side applications using JavaScript in a straightforward MVC (Model View Controller) approach.
AngularJS framework is a JavaScript-driven development framework used for creating Rich Internet Applications (RIAs).
Applications created using the AngularJS framework are inherently compatible with various browsers. AngularJS takes care of the automatic management of all JavaScript code, ensuring it is optimised for each browser.

That’s not all for the features of AngularJS. There are some additional features also. So, let’s look at them too.

Scope – These are the entities that point to the Model. Simply stated, they are cement between View and Controller.
Data-Binding – The process is automatic data synchronisation between Model and View elements.
Services – AngularJS framework consists of different inbuilt services.
Controller – They are the JavaScript functionalities that confine a specific scope.
Directives – They are markers on DOM components. Programmers utilise them to create personalised HTML tags. The AngularJS framework comprises built-in directives.
Filters – These aid in selecting subsets for various items from an array and provide a new array as the result.
Routing – It is a concept in AngularJS for changing views.
Templates – Here, the information from the Model and Controller is saved, commonly referred to as the displayed View.
Deep Linking – It allows developers to store the application state in the URL, which is essential for bookmarking. Moreover, using the URL makes it easy to restore the application to the same state swiftly.
Dependency Injection – The AngularJS framework includes a built-in dependency injection, aiding developers in achieving smooth software development.
MVVM – Take note: AngularJS doesn’t follow the traditional implementation and integration of MVC. Instead, it opts for an approach more aligned with MVVM (Model-View-ViewModel), often humorously referred to as Model View Whatever.

AngularJS Example

Imagine building a dynamic task manager using AngularJS, a framework designed to simplify web development. In this example, we’ll focus on the main features without diving into specific code snippets.

Task Listing:

Display a list of tasks retrieved from a data source.
Leverage AngularJS directives to seamlessly bind data to the view, enabling real-time updates.

Task Addition:

Implement a user-friendly form to add new tasks.
Utilise AngularJS controllers to manage the logic behind handling user input.

Task Deletion:

Enable users to remove tasks effortlessly.
Leverage AngularJS directives to create interactive buttons and enhance the user experience.

Task Filtering:

Implement dynamic filtering options for tasks.
Use AngularJS filters to categorise and display tasks based on their status, priority, or due date.

Task Editing:

Allow users to edit task details on-the-fly.
Leverage two-way data binding in AngularJS to synchronise changes between the model and the view seamlessly.

Task Sorting:

Enable users to sort tasks based on different criteria.
Leverage AngularJS directives to implement sortable headers for the task list.

Task Completion Tracking:

Implement a visual indicator for completed tasks.
Utilise AngularJS expressions to dynamically update the UI based on task completion status.

Responsive Design:

Ensure the task manager is responsive on various devices.
Leverage AngularJS features for dynamic layouts and adaptive user interfaces.

Real-time Updates:

Explore AngularJS capabilities for handling real-time updates.
Implement features like WebSocket integration for instant task status changes.

Error Handling:
Implement robust error handling mechanisms.
Leverage AngularJS services to communicate with the server and handle potential issues gracefully.

This example illustrates the versatility and power of AngularJS in creating dynamic and responsive web applications. Each feature is seamlessly integrated, demonstrating the framework’s ability to simplify complex tasks and enhance the overall user experience. While the specific implementation details are omitted, this overview provides a glimpse into the potential of AngularJS in building modern and feature-rich applications.

Also Read: HTML Tags List: HTML Cheat Sheet

AngularJS Expression

In AngularJS, expressions are snippets of code enclosed in double curly braces {{ expression }} and are used to bind data to HTML elements. These expressions are evaluated in the context of the AngularJS scope, allowing dynamic content rendering. Expressions can involve simple variables, mathematical operations, function calls, and more.

They are commonly utilised in data binding to seamlessly connect the model and view, ensuring real-time updates in the user interface. AngularJS expressions offer a concise and powerful way to inject dynamic content into HTML templates, enhancing the flexibility and interactivity of web applications without requiring traditional JavaScript code blocks.

What is AngularJS Used for?

AngularJS has many uses in the real world. Here are some of the uses that AngularJS finds in practical scenarios:

Travel Application: Travel applications make it easy to plan a trip. Now, in this world of technology, there is no need to go to a travel agent. One can do the same work on its own. It is an application, which is used for various purposes such as searching for a flight, changing the seat, booking a trip, cancelling a flight, tracking flights.
Weather Application: To learn about the weather, a weather application has been built. It can help us to know about the weather conditions of any place even by sitting far away from that place. Weather.com is the weather forecasting application that is built using angular.
User-Generated Content Portals: These are those portals in which a user can upload its content on its own. It is a platform where employers can post their projects then interested freelancers bid for it. According to their interest, employers choose their freelancers and then employers pay to freelancers as per their deal.
E-Commerce: Angular provides a way through which an e-commerce website is easy to build. Now, anyone can easily buy a product or sell a product using an online service. “Pay with PayPal, safe hai”. One can check out in an easiest and faster manner using PayPal even if you are shopping outside India.
Mobile Commerce: Mobile commerce is abbreviated as m-commerce. It provides a way to buy and sell goods through wireless devices such as mobile phones. It is a personal shopping application for buying goods. It allows people to browse over a wide range of fashion brands over the world.
Video Streaming Applications: With the help of AngularJS, we can build applications for uploading and streaming videos.
User Review Applications: Everyone wants to know about a service or product before using it so that they can get familiar with what they are using, how it works, what are its advantages and disadvantages and other queries he/she wants to know about that product or service.

What is AngularJS vs JavaScript?

AngularJS and JavaScript may seem like they are the same. However, they are very different from each other. So, here are some of the primary differences between AngularJS and JavaScript:

What is AngularJS vs JavaScript?
JavaScript	AngularJS
It was developed by Netscape.	It was developed by Google.
It is a lightweight and object-oriented scripting language	It is an open-source framework.
It works on the concept of dynamic typing.	It works on the model view controller (MVC) concept for building apps.
JavaScript is fast in comparison to AngularJS.	It is slow in comparison to JavaScript.
It does not support dependency injection.	While it supports both dependency injection and data binding.
It is complicated for beginners to learn JavaScript.	It is easy to learn AngularJS for beginners who know JavaScript.
It does not provide support for filters.	It provides support for filters.
It is used for dynamic web applications.	It is generally suited for building large single-page applications.

What is AngularJS Frontend or Backend?

AngularJS is different when used in the frontend or backend. Here’s the difference between AngularJS frontend and backend:

AngularJS Frontend

Angular is a remarkable front-end development framework for contemporary online projects. It enables you to address contemporary issues by creating successful user interfaces for web platforms and mobile applications thanks to its clear, straightforward architecture, modular design, and component structure.

The majority of an Angular application’s components are their HTML templates. Angular apps need to be compiled before they can be used in a browser since the components and templates offered by Angular cannot be interpreted by the browser directly. During the build step, the Angular compiler will transform your Angular HTML and TypeScript code into effective JavaScript code before the browser downloads and executes that code. Your application will render in the browser more quickly if it is compiled while being built.

AngularJS Backend

As a backend developer, you should know a few concepts like Object-Oriented Programming, Services, Dependency Injection, Web API, Error Handling, Unit Testing, and so on. Also, you need to know about the front-end framework to utilise all your backend skills to build client applications in HTML, CSS, and JS.

Although Angular is not preferred in backend development, it can be used for API-based UI design through the backend. Recently, Infiraise was working for a client called OUT, and they used backend for creating UI structure through Angular.

The above explanation is enough to say that Angular can be used for both Frontend and Backend Development.

Also Read: How to Center Text & Headers in CSS Using the Text-Align Property

Why Is AngularJS Still Used?

AngularJS continues to be used for several reasons:

Legacy Codebases: Many existing projects and applications were built using AngularJS. Transitioning to newer frameworks can be a significant undertaking, and organisations often choose to maintain and support their existing AngularJS applications.
Mature Ecosystem: AngularJS has a mature ecosystem with a large number of third-party libraries, plugins, and resources. This can be beneficial for projects that want to leverage existing tools and solutions.
Developer Familiarity: Developers who are already well-versed in AngularJS may prefer using it for new projects. Transitioning to a different framework may require additional training and adaptation, making AngularJS a convenient choice for those already proficient in it.
Stability: AngularJS is a stable framework with a well-established codebase. For applications that don’t require the advanced features or performance improvements offered by newer frameworks, stability can be a compelling reason to stick with AngularJS.
Resource Constraints: Some organisations may not have the resources or the immediate need to migrate to a newer framework. In such cases, maintaining and supporting existing AngularJS applications might be a pragmatic decision.
Specific Use Cases: AngularJS may still be a suitable choice for certain types of applications, especially when the application’s requirements align well with the capabilities of AngularJS.

However, it’s essential to note that AngularJS has reached its official end-of-life, and Angular (2 and above) has become the primary focus for Angular development. Developers are encouraged to consider migrating to the latest versions of Angular for ongoing support, improved features, and long-term sustainability. Additionally, the information provided here may evolve, and it’s recommended to check for the latest industry trends and updates.

AngularJS remains a relevant and viable option for certain projects, particularly those with established codebases, resource constraints, or specific use cases that align well with its features. Its mature ecosystem, developer familiarity, and stability contribute to its continued usage.

However, it’s crucial to acknowledge that AngularJS has officially reached its end-of-life, and migration to newer frameworks, such as Angular (2 and above), is recommended for long-term support, enhanced features, and community-backed sustainability. The decision to use AngularJS should be made with a careful consideration of the project’s requirements, available resources, and the evolving landscape of web development.

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AngularJS FAQs

What is AngularJS?

AngularJS is a JavaScript-based open-source front-end web application framework developed by Google. It simplifies the development of dynamic, single-page web applications by providing a structured framework and tools.

What is the main feature of AngularJS?

The key feature of AngularJS is two-way data binding, which establishes a seamless connection between the model and the view. Changes in the model automatically reflect in the view, and vice versa, simplifying the development of interactive user interfaces.

How does AngularJS differ from Angular (2 and above)?

AngularJS (Angular 1.x) and Angular (2 and above) are distinct frameworks. Angular introduced a complete rewrite with architectural changes, improved performance, and additional features. AngularJS, while still used, has reached its end-of-life, and developers are encouraged to migrate to the newer Angular versions.

What is the AngularJS expression syntax?

AngularJS expressions are enclosed in double curly braces {{ expression }}. They are used to bind data from the model to HTML elements, allowing dynamic content rendering in the user interface.

Is AngularJS still relevant?

While AngularJS is still used in existing projects, it has reached its end-of-life, and developers are encouraged to migrate to newer frameworks like Angular. The decision to continue using AngularJS depends on factors such as project requirements, developer familiarity, and resource constraints.