As we see, numerous frameworks are emerging day by day in the Web Development field. Most of these get updated on a regular basis. In the case of Angular, various updates have already come within a few years. The first version of AngularJS was developed by Google, which was released in 2009. Angular is leading the world of JavaScript frameworks, supported and adopted by both individuals and enterprises alike. Hence, Angular has enhanced its versions, such as AngularJS 1.0, Angular 2.0, Angular 4, etc., to cater to the widening user base.

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It is really tough to decide which framework to choose for developing dynamic web and mobile applications. Before moving into the comparison among AngularJS, Angular 2, and Angular 4, let’s first know ‘What is Angularjs?,’ ‘What are its various versions?’ and their features and drawbacks. Keep on reading!

To get a clear understanding, check out our video on Angular:

What is AngularJS?

AngularJS is also referred to as Angular 1, which is an open-source JavaScript framework. This framework is designed to build single-page applications. It overcomes the downside of HTML and also makes the best practice of libraries. Following are some of the features of AngularJS:

• Model-View-Controller: AngularJS supports the MVC architecture that makes it easy for developers to design client-side web applications.
• Data model binding: There is no need for writing code to bind data to HTML. This will be done by adding a few code snippets by Angular.
• Requires less code: Before Angular, there was a need for a lot of JavaScript code for Document Object Model (DOM) manipulation for developing an application. Angular requires lesser code for DOM manipulation.
• Unit testing: Earlier, it was time taking to perform testing for each component of an application. In AngularJS, the testing process is very simple. It uses dependency injection to connect with the application that manages and controls everything with simplicity.

Following are some of the pros and cons of AngularJS.

Pros:

• AngularJS supports both unit testing and integration testing.
• It provides a routing facility, which is making a move from one view to another.
• It provides two-way binding, which keeps the presentation layer and data in sync.
• It provides directives that help the functionality of HTML elements, which provide more power to a web application.

Cons:

• AngularJS is less secure because it doesn’t provide server authentication and authorization.
• It might lead to a memory leak, which causes various issues such as high latency, crashing, and slowing down of the process.
• It has various ways to perform the same task, so it is hard to predict which is the best way to perform the task.
• It is not supported everywhere, and it is totally based on JavaScript.

What is Angular 2?

Angular 2 (Angular) is a complete remake of the original AngularJS. It was rebuilt from scratch using TypeScript by the Angular team, keeping in mind the concept of having components with better performance and improved features that would help Web Developers. Some of the key features of Angular 2 are as given below:

• TypeScript: TypeScript is the superset of JavaScript that allows an increase in code efficiency by using the OOPs concept.
• Components: Angular 2 focusses on components over controllers, which helps in efficiently maintaining applications within a period of time.
• Services: It provides a set of code (services) that could be shared by various components of the applications.
• Cross-platform: With Angular, we can build and run applications on desktops, iOS, and Android systems.

Here are some of the advantages and disadvantages of Angular 2.

Advantages:

• Angular 2 provides simpler routing, and it is mobile-oriented.
• It provides various languages to choose from, such as TypeScript, Dart, ES6, and ES5.
• It has enhanced modularity and dependency injection.

Disadvantages:

• Angular 2 is tough to set up when compared to AngularJS.
• It is not effective in building small and simple web applications

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