Facts about AngularJS Pros and Cons

Facts about AngularJS Pros and Cons
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AngularJS is a structural framework used for development of dynamic web apps. The framework is popular with developers due to their familiarity with JavaScript framework. However, not everyone is a fan of this framework. To make things clear, let’s take a look at some of the pros and cons of AngularJS.

Facts about AngularJS Pros and Cons
Facts about AngularJS Pros and Cons

AngularJS Pros and Cons

Not sure about AngularJS? Oh boy – read this first (grand daddy list of all single page application development frameworks)

Pros (first of course!) of AngularJS

  • Two way Data binding

The templates in AngularJS work differently. The template (written in HTML) is compiled on the browser. After compilation any changes to the view are immediately reflected in the model and vice versa. This programming model simplifies the task for the developer.

  • Easy Testability

In AngularJS, the view is only a projection of the model. The controller is separated from the view. This allows the programmer to test the controller in isolation without the view. It helps the programmer to test DOM/browser dependency.

  • Quick Prototyping
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While building a prototype you will be using data binding features most of the time. All you need is a bootstrap (it has many libraries), Angular Bootstrap UI (it wraps useful bootstrap components with AngularJS directives) and some libraries that you find useful. Once you have these things ready, you need to set up your controller for Angular code in the body of the page and then start building your UI using boot strap components. Then, build some dynamic UI stuff, use an Angular directive and your prototype is ready for testing.

BTW, interested in a quick way of getting started? Read this post about a modular approach to creating AngularJS projects (seed)

  • Dependency injection system

AngularJS implements Dependency injection system where the components are not hard coded but are given their dependencies. This allows the programmer to make components reusable, testable and maintainable.

  • Fast loading

Once the initial page is loaded other pages are loaded very fast.

Interested in learning more about AngularJS performance improvements? We have you covered here.

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Cons (not too fast buddy) of AngularJS

  • Forces unwanted downloads

A site using AngularJS may have many page views. When the user tries to load the site many views are automatically loaded whereas the user is only interested in only one view. This leads to download of unnecessary code, information and content.

  • Hard to debug

AngularJS is hard to debug unless you know how every component fits in and how it works. There is no easy way to debug the errors unless you completely understand it. Besides if the user is undefined, errors in bindings will not be fired. You cannot find errors using the debugger. If any error is fired in the digest cycle, the reason can be change in any variable in whole application.

  • Learning curve very steep

You need to have a strong engineering background or knowledge to understand working of AngularJS. The problems starts when developers start server side programming. Many developers are not familiar of the fact that JavaScript can also be written using Object Orient programming concepts which is something new for developers. Thus despite having loads of experience in JavaScript they have to forget old way and start afresh when working with AngularJS.

  • Directives are difficult to use
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The directives are the most interesting part and also the most difficult. While using the directives you need to first understand why you need it. This means before writing the code you have to think a lot on how to do it. You need to integrate code and wrap in the directive before using it. The naming convention in Angular also adds to the confusion. For example, the controller function in the directive has same name as usual controller.

With AngularJS 2, you can expect majority of complexity disappearing and AngularJS becoming more popular in developers. Here are a few more resources in case you are interested in playing around more with AngularJS

How to upload files directly to AWS S3 from your AngularJS code.

NISOS Tech-  your custom web and mobile app development partner

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