7 Common Mistakes of Angular Developers and How to avoid them

AngularJS is an efficient Javascript framework created by Google. Efficient single-page applications can be made by using this framework. It enables the front-end developers to improve the user experience for the single-page apps. The work of an AngularJS developer is not limited to writing and testing JavaScript, HTML, and CSS, he also needs to do something more than that.


The increased demand for AngularJS development attracted software development companies to hire dedicated AngularJS developers. AngularJS development is not so hard, yet many developers have failed to use its potential by committing some huge mistakes. In this blog, we will show you seven common mistakes of Angular developers with their solutions.

What are the mistakes of AngularJS developers?

An AngularJS development company ensures the efficiency of the AngularJS developers before recruiting them. Yet, it happens that sometimes these developers commit mistakes while working with codes. Anybody can make such mistakes whether he is a newbie or experienced. Let us look at these mistakes so that the AngularJS developers can omit them before starting their work:

1.      Fail to unsubscribe

Being a part of a dedicated programmers team, you cannot ignore or fail to unsubscribe a service or an event. The scenarios where unsubscription may turn into a high risk are as follows :


  • The OnDestroy lifecycle has been started by you in case it is in your subscribed component.
  • You prompt the lifecycle hook on your own in case it is a service that you have subscribed to previously.


It is a good practice for an AngularJS Development Company to unsubscribe their components or service rather than ignoring it. Different libraries and strategies can help you to unsubscribe a Javascript variable.

2.      Inefficient code handling

A proper organization of codes is the basic thing to do as an AngularJS developer. Still, some developers end up making a mistake. The AngularJS development process distributes the codes into small cubicles or compartments. Thus, it becomes easy for an AngularJS developer to track them down and solve them one by one.


The separation of code will not attract you at first, but it will later become vital for you. A precisely compartmentalized code will help you to make a flexible Angular app.


In the AngularJS development, the developers have to work with the MVC architecture. Thus, there is a tendency to put excessive codes into a single controller. A proper code organization is helpful when your programming team is working on the same project.

3.      Manipulating the DOM directly

Sometimes, AngularJS developers make a mistake by changing the DOM or controller directly. Developers tend to alter DOM directly when they have to refresh the page’s title, execute SVG, or have to focus on control after a validation error.


To prevent yourself from altering the DOM, you can use jQuery ElementRef.nativeElement, or you can use the Renderer2 service.

4.      Using the jQuery


jQuery is a customary library used for manipulating the DOM easily. But AngularJS is used to make highly scalable applications, that are tested properly. Thus, you cannot use jQuery to amplify your HTML documents. The developer must know all the essential features of Angular before using jQuery in the app development. Even in the case of DOM manipulations, it doesn’t mean that you need to use jQuery every time.

5.      Not using $applyAsync

$digest() is a polling method implemented due to the subsisting directives in Angular. $applyAsync helps you to take care of the resolution of the expressiveness of code until the $digest () next cycle. You can use $applyAsync automatically or manually.

6.      Ignoring the use of Batarang

Batarang is a Chrome extension used to debug and build AngularJS apps. It offers model browsing for viewing models attached to scopes. It’s beneficial for viewing values connected through abstract scopes and operating with directives. Also, it provides you with a dependence graph.


If it is introduced into an untested codebase, the essential services can be determined easily. That is why the AngularJS developer shouldn’t miss this wonderful tool.

7.      Multiple NgModule entries

Acknowledging the same component in multiple NgModules is the biggest mistake committed by many AngularJS developers. They need to acknowledge every component in its specific NgModule.


If they want to use it in different modules, then they need to consider the following things:


They can use NgModule.declaration of the child for acknowledging the HeroComponent in the child module in case of any parent-child connection. After that, they have to use the NgModule.exports array of the child for exporting HeroComponent. Finally, they have to use NgModule.imports array of the parent to import the child module.


They can acknowledge another NgModule as the shared information module, in case it is not a parent-child module connection.

Final Words

It is quite normal to make mistakes while developing an AngularJS app. Even experienced AngularJS Developers also commit mistakes. It’s all about how a developer can handle and rectify it. AngularJS developers can make a note of these mistakes before starting their work and make sure they do not repeat the same. I hope we have cleared these mistakes for you. Keep following this space for more such knowledgeable insights.


Shahid Mansuri

Shahid Mansuri Co-founder Peerbits, one of the leading offshore development teams provider.  With his guidance many companies hire remote developer team from Peerbits for their complex and customized projects. His years of hardwork, dedication, and experience has helped him in developing profound expertise for a wide array of technologies, tools, and platforms. He believes in sharing his strong knowledge base with learned concentration on entrepreneurship and business.