Advantages of AngularJS Over Plain JavaScript

Advantages of AngularJS Over Plain JavaScript

Many people have many questions about AngularJS. In this article, one of the questions being answered. “What are the advantages of AngularJS over plain JavaScript?”.

JavaScript or ‘JS’ is a full-fledged dynamic programming language that has the ability to provide dynamic interactivity to web pages. Along with CSS and HTML, javascript is one of the three core technologies powering the Internet. It is used to program the behavior of web pages. It is a scripting language in which we can do both client-side and server-side programming. As of May 2017, 95% of 10 million web pages used in JavaScript. The most common use of JS is to add client-side behavior to HTML pages, also known as Dynamic HTML (DHTML). Scripts are embedded in or included from HTML pages and interact with the Document Object Model of the page. A JavaScript Engine is an interpreter that interprets the JavaScript source code and executes the script accordingly. Plain JavaScript also was known as Vanilla JS refers to the use of JavaScript without the aid of any framework, that is, pure and simple JavaScript code.

What is AngularJS?

AngularJS is a leading framework for building a JavaScript-heavy single page web applications. Single page apps or SPA’s load the entire content of a site within a single page. This single page is usually an index.html file. This means that once the page is loaded, clicking on links will not reload the entire page but simply update sections within the page itself. USAToday.com is a great example of this technology used in modern websites.

Advantages of AngualrJS overplain JavaScript

The popularity of SPA-based web apps has taken off based on the fact that they allow us to deliver rich, dynamic, and fast-loading content that mimics that of a desktop application. One big difference between Angular based sites and traditional ones like plain JS is that Angular expects the browser to build the web page.

Advantages of AngualrJS over plain JavaScript - Loading content flowchart

In the diagram above, in the left configuration, the server sends to the browser all the data to build a web page – which includes the HTML, CSS and Javascript files, and then the browser does the work of building the final template that’s displayed in a web page. Now, this may seem a lot of work for the browser but in fact, results in much faster load times. When compared to traditional applications that use PHP, Java, the server is responsible for the heavy work. This includes accepting requests, fetching data, and final building of the web page. Relying exclusively on the server may result in higher usage fees and consequentially result in slower load times during heavy traffic on web pages. In addition to speed and performance, Angular JS allows us to write much more succinct code than the plain javascript. We’re able to add if conditions, loops, and local variables and local variables directly within our templates. We’re also able to track, process, and display changes from the user using the magic of data binding.

Keeping Three concepts in mind because of which Angular was developed – Make it modular, make it testable, make it maintainable. Angular 1 gave us modules to effectively separate out our code for testing and maintenance. Angular 2 brings us components an even better way of separating out our logic. Angular version1 was first published in 2009 and became a massive success with millions of developers adopting and using the framework. Angular version 2 introduces sweeping changes along with a complete code rewrite.

Advantages of AngualrJS over plain JavaScript - Guiding principles

Angular JS has been developed by Google and hence there is a huge community to learn from. It’s easy to learn. Most frameworks require programmers to splitting the app into multiple MVC components. After that, the programmer has to write a code to put them together again. AngularJS, however, strings it together automatically. That saves you time and reduces the app’s time-to-market. The development and testing of a SPA are incredibly swift with the Angular JS framework. Angular tries to offer a component-based approach. This is easy to overlook when you are faced with a lot of other complexity. It can handle the project’s initial framework effectively. You can add animations and transitions anytime during the project to build a powerful website as well as applications. Designers and developers with JavaScript experience prefer Angular JS to create rich web experience in a short time. AngularJS is a comprehensive solution for rapid front-end development. It does not need any other plugins or frameworks. Moreover, there is a range of other features that include Restful actions, data building, dependency injection, enterprise-level testing, etc.

We now try to create most of our components in such a way that they can be used in multiple applications without changing a single line of code. We even use components in a Microsoft Windows 8.1 WinRT application (that uses AngularJS) developed in Visual Studio and it all works fine. Component driven AngularJS development is still in its early stages but it is incredibly promising. Apart from its technical benefits, it highly increases productivity and offers a lot of practical advantages that benefit teams of any size.

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