10 Most Common Mistakes that AngularJS Developers Make

Perfection in programming is achieved not when there is nothing more to add but when nothing is left to make a mistake.

In this modern digital era, nothing is constant. Everything is changing at lightning speed. What was new and trending weeks ago is now outdated and insignificant. Programming languages are no exception to it either. However, Angular JavaScript is one language that survived every trend and still stands stronger than ever. It is the third most popular programming language for developing single-page web applications. It is an open-source front-end web application framework based on JavaScript that easily tackles the issues that arise while designing single-page applications. 

AngularJS developers, like in any other language, are bound to make mistakes. There will be numerous types of mistakes you might and will make. Most of them will be due to a habit you established while studying the language. Others are the result of the habits you form while working every day. 

To become a better programmer, one will need to avoid making these mistakes. This article will discuss the top ten mistakes AngularJS developers might be making while programming daily and what can be done to rectify them. 

Common AngularJS Development Mistakes and How to Rectify Them 

1. Modifying the DOM Directly

One of the most common mistakes AngularJS developers make is directly changing or manipulating the DOM (Document Object Model). It is a platform and language-neutral interface that enables programs and scripts to dynamically access and alter a document’s content, structure, and style. Stakeholders regard this as an API for HTML and XML. The DOM allows you to refresh a page’s title if there is any change in SVG execution and control after a validation error. 

Every developer alters and manipulates the DOM directly to find an easy way out of the situation. But there’s a better and more efficient way out. Instead of modifying the DOM, you may use jQuery, a global document object, or ElementRef.nativeElement. You also have an excellent choice of using Renderer2 services. But, in either case, you need to avoid modifying DOM directly. 

2. Not Organizing Codes Appropriately

In AngularJS, proper organization of your codes is the key and most essential part of coding, yet this is where even professional developers commit a mistake. The entire development process entails the equitable division of codes into little cubes or compartmentalizing so errors may be tracked down and worked on effectively. Adding excessive codes to a single controller often leads to more errors, and since the AngularJS involves MVC architecture, there is a high possibility it will create more errors. 

Even in the controller, experts advise creating minimized compartments for each territory of your applications. The practice has proved to be a very important part of app development. You won’t find it essential initially; however, when your development team starts working on the project, it will be easier for them to perform, identify errors, and construct every smaller component. 

3. Improper Use of Event Handlers

AngularJS Development Company is often under high pressure to meet customer deadlines. The situation may encourage developers to combine rational layers and assign an excessive number of tasks to the controllers, resulting in code designed to do far more in a given condition. 

AngularJS is the perfect choice for adding functionality to an activity, such as clicking a button by the user. However, this violates one of the Angular framework’s core principles, which is to keep all displays and logic in order. It won’t if one uses the event handlers improperly. That’s why developers need to understand and use event handlers efficiently. 

4. Utilization of jQuery

jQuery is a conventional and customary library that helps manage events and make alterations to the DOM easily. However, AngularJS itself is a smarter JavaScript framework packed with full features of DOM manipulation, which is vibrantly used for the development, building, and testing of scalable apps. Therefore, one cannot use it to build HTML reports. The AngularJS also includes a broad number of features that a programmer should know and understand before actually including jQuery in the development. All in all, using jQuery to employ DOM in Angular is a mistake every developer wants to avoid. 

5. Unsubscribe Operation

Ignoring or failing to unsubscribe is another biggest mistake Angular developers make. Many programmers do it and forget to clean up the subscription. But for a professional and skilled developer, it should never be an excuse to forget to unsubscribe. Forgetting to unsubscribe is a very concerning mistake. The reason is that it causes major issues and puts data security in jeopardy is constant new subscriptions. It also results in memory leaks in the long run. 

Due to lingering subscriptions, there is a considerable probability of memory leaks in the system. Now the situation arises with two possibilities: 

• If the OnDestroy lifecycle hook is present in your subscribed component, initiate it 
• If you have already subscribed to a service, initiate the lifecycle hook on your own

No matter the situation, you need not be clumsy about this common-yet-critical mistake. Rather, be very attentive and cautious to eliminate any long-term harm to the project. 

6. Inability to Practice Available Tools

One of the most essential qualities of a good AngularJS developer is to utilize the tools in their hands. Test Whiz and Protractor are the most commonly used developing tools in this case. How effectively a developer can make use of the available development tools is, in fact, the desired parameter for hiring an AngularJS developer. Surprisingly, not every developer exploits the available tools. 

Using these tools will help developers to a great extent. For example, Firefox and Chrome use development strings, including profiling, research, and mistake yield. These tools support designers in identifying errors and saving time. 

7.  Acknowledging the Same Component in More Than One NgModule

A component is the basic building element in Angular app development. And using the same component in multiple NgModule is the most recurring mistake AngularJS developers make, which throws an error right at your screen. The error primarily occurs because every developer needs to assign each component in the scope of its own NgModule. One component can only belong to a single module. You will need to list it in the NgModule.declaration array of the current NgModule if you wish to use it elsewhere. In this particular parent-child condition, you need to: 

8. Fixed Scope Binding

Before we go ahead and point it out as a mistake, first, let us explain what it is. In the context of AngularJS, the term scope means all the built-in objects that contain application data. Now, we know that AngularJS is entirely equipped with so many exciting features and is completely dependent on the MVC structure. The role of the scope is to bind the controller and view together. In general, AngularJS provides its very own set of scoping rules. However, developers must assemble their scope objects correctly to ensure a proper binding and smooth app development. 

The only concern is that the simple use of information sources is limited to a model. For example, it can trigger a typical breakdown in the binding system. The developer needs to properly set their object for the scope to bring this problem to an end, guaranteeing a smooth turn of events. 

9. Failing to Examine the App Before Launching

It shouldn’t be; yet, this is one of the most common mistakes that AngularJS developers make. It’s pretty convenient for developers to compile and run a program on their machines, assuming it will work perfectly with every other system. That’s why it is indispensable for Angular Developers to run and examine the app before launching it. What programmers ignore here is that applications may not run seamlessly in cross-browsers. This is one of the reasons why companies hire AngularJS developers who can work on well-known tools which work well across browsers. 

The developers will discover strange and unexpected bugs while testing the app in different environments. One need not cultivate a different domain with every operating system. You only need to test your application with the help of popular cross-browser testing tools. Fortunately, there are so many cross-browser testing tools available. These tools come in handy for examining the app. LambdaTest, for example, is a budding startup and tool that provides you real-time access to 2000+ browsers and many operating systems online. 

10. Utilize Batarang

For those who don’t know what it is, let us tell you that Batarang is a powerful Google Chrome extension. It is widely popular among AngularJS developers. They use it to create and debug apps. It comes to the rescue for the developers when they want to apply it to abstracting scopes where arguments are restricted. Although it’s a really useful tool, many developers fail to use it. Not using the extension to its fullest potential is another common mistake many AngularJS developers make. 

Summing Up: 

AngularJS is an impressive front-end framework and toolset most suited to application development. It is completely extensible and works nicely in conjunction with other libraries. AngularJS can modify every feature to meet your specific development workflow and feature requirements. AngularJS allows you to describe behavior in a clean and readable manner without the typical boilerplate of changing the DOM, monitoring model changes, or registering callbacks. For these reasons, it is currently one of the most effective tools for building single-page applications. And because it is scalable and supported by Google, you will receive lots of help and guidelines to get started. 

Developing, on the other hand, is not an error-free skill. It is natural to make mistakes; everyone does, even the most seasoned specialists. Most of them do so because of the studying methods, whereas others are from habits. But the key to being a better developer is to commit a mistake once and never repeat it. At last, it all boils down to how you handle it. The best way to avoid those mistakes is by jotting them down and glancing at them while resting those magical fingers on the keyboard next time or you can simply reach out to the experts at Zuci.