12 Common Mistakes that Angular JavaScript Developers Commit


Keval Padia

Developers are continuously reviewing codes, finding an error or a bug and then fixing the bug to develop an optimized application. They aim at providing the best and unique user experience to the customers through designing apps accordingly.

While using the Angular JavaScript platform, developers often commit some mistakes. They try coding, testing and re-coding to know how their code would work and function smoothly in the users’ device. Coders make mistakes in their initial attempts to develop and optimize an app and what they learn from their mistakes increases their expertise and enhances their app development skills. Any developer tends to make mistakes while developing an application on the Angular JavaScript, be it a toddler in this field or someone who has years of experience in it.

Developing an app in AngularJS is not so tough, yet, there is a minor probability of error which lets the developers a few common mistakes.

Let us know a few of the most common mistakes that developers make while developing an app in Angular JavaScript

1. Neglecting unsubscription

While working in AngularJS, the developers need to clear up their subscriptions. When the developer completes an observable or event in the Angular platform, many libraries would try to get access to your event. If you, as the developer do not unsubscribe, it can lead to memory leaks across the system. This leads to the development of significant risks which need to be taken care of at the earliest. The two scenarios that create risk when the developer forgets to unsubscribe are as follows:

  • You start the OnDestroy LifeCycle Hook when it is among your subscribed components.
  • You initiate the lifecycle hook when it is a service that you had previously subscribed.

2. Making direct changes to the DOM

One of the most widely committed mistakes while developing an app in AngularJS is making direct changes to the DOM. Coders tend to directly alter DOM when they have to refresh the title of the page, have to execute SVG or have to focus on control after a validation error. A Global Document Object like jQuery or ElementRef.nativeElement you can resist yourself from, making direct changes to the DOM.

3. Using jQuery

jQuery is a customary library that makes altering the DOM very easy and helps in dealing with events effectively.

4. Organizing code improperly

Organizing your code is one of the key part of coding in AngularJS and you need to create small organized units for your logic layer. Organizing your code is very useful when you are working in aa team and there are multiple coders working on the code.

5. Addressing the same component in the different module

Every component in AngularJS needs to have its own NgModule as it is the most basic building element of an app. Similar components can be shown in different modules by showing a connection between those modules.

6. Fixed scope binding

Coders should learn that in AngularJS references pass the non-primitives, while value passes the primitives. Hence, the developers should precisely fix and assemble the scope.

7. Improper compartmentalizing

One of the most important parts of coding in AngularJS is compartmentalizing the code. It plays a vital role in successfully developing the app. When the developers are working collectively in a team, code organization is an integral part that helps the developers to work effectively on the same project.

8. Keeping a count of the Watchers

When there are hundreds or thousands of watchers in the code, the code begins to slow down the performance of the application in the browser. The global maximum limit for the AngularJS watchers is 2000. Hence, it is important to keep a constant check on the number of watchers that are viewing the code when the application is being developed. Including watchers in coding helps in modifying as well as optimizing the code later.

9. Failing to test

There are innumerable bugs that can incur when the app is running in different environments. Hence, one of the biggest pitfalls of Angular developers is to avoid testing the app.

10. Avoiding the use of $applyAsync

$applyAsync helps in maintaining the code’s expressiveness in the $digest() and hence, coders should use it in the development of their app on AngularJS.

11. Using event handler inappropriately

AngularJS has a fundamental rule to keep the display and logic in a sequence which may make it difficult to add functionalities based on the user input.

12. Skipping the use of Batarang

Batarang is very useful Google Chrome Extension that helps in debugging and developing Angular apps. It is very useful to detect restricted arguments and hence, AngularJS developers should not neglect it.

How can we help you develop an error-free app in AngularJS?

Mistakes are not mistakes if you learn from it. However, if your coders or your app development company make the same mistakes again and again, then you need to contact an expert team that specializes in avoiding these mistakes.

Get in touch with us at, Nimblechapps and hire our AngularJS Developers having profound exposure and expertise in building apps with the exclusive user experience.

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