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10 Common Mistakes That Angular Developers Commit

While using the Angular JavaScript platform, developers often commit some mistakes. They get to know about using this platform, the ways of optimizing an app and the ways of enhancing their code also.

While developing an app on the Angular platform, they review codes and try to enhance their expertise if they find any backlog. While reading and reviewing code and code examples online, you can find that Angular developers often do some mistakes. Be it’s about a newbie or an expert developer with many years of experience; anybody can make mistakes in the code.

Everyone must learn from his/her mistakes and the same goes for a developer too. There are some common mistakes that Angular developers usually commit. You need to narrow down the list of possible mistakes which these developers commit.

So, what are the common pitfalls which Angular developers do while developing apps? Have you ever made such mistakes? Let’s look at some common mistakes made by Angular developers and how they can abstain from them. We will discuss them in brief and will help you understand how you can solve them.

1. Failing to Unsubscribe

Being a part of the team of Angular developers, you cannot just give an excuse of ignoring or failing to unsubscribe. In Angular, you need to clean up your subscriptions. Once you have completed using an observable or an event in JavaScript, consider that there are many libraries and strategies built exactly for dealing with these acts of unsubscribing.

Since constant subscription leads to memory leaks in a system, this unskillfulness risk develops and becomes a huge problem. When it comes to unsubscribing, two basic scenarios are seen:

  1. You initiate the OnDestroy lifecycle hook in case it is in your subscribed component.
  2. You prompt the lifecycle hook on your own in case it is a service which you have previously subscribed in.

In a nutshell, when you do not use a component or a service anymore, do not forget to unsubscribe it.

2. Not Organizing Codes Appropriately

In Angular, one of the key parts of coding is to organizing your codes. Usually, you must have a Controller for a View while working with MVC. Since this controller is your principle layer and you should make compact compartments inside this rationale layer for every area of your apps.

Putting extra concept into a single controller is a common mistake. In case you need to compartmentalize your layer for your app for making sense, never go for substitute ways. Instead, create smaller organized units for the logic layer.

So, this is proved that separating code is one of the most important parts of app development. Initially, you will not find it much vital but when your development team will work on this project, it will become simpler to perform, find pitfalls, and build each and every smaller part. A precisely compartmentalized code helps make an app flexible enough for creation that helps as your company develops gradually.

Read also: AngularJS Development Skills – Benefits for Developers

3. Involving in the jQuery

To deal with events and make alterations to the DOM more easily, developers use jQuery which is a customary library. On the other hand, the Angular platform is utilized for developing scalable apps, app testing, app building and thereby, you can’t use it in building up the HTML documents.

Angular framework boasts plenty of features; thereby, a developer needs to have an idea about all accessible features prior to engaging jQuery in the app building. In fact, In case you need to alter DOM, you don’t have to compulsorily use jQuery.

4. Making Changes to the DOM Directly

Sometimes making direct changes to the DOM or from the controller itself appears to be one of the most common mistakes committed by Angular developers. Since altering the DOM is a common job while using the JavaScript platform:

  • You possibly have to refresh the title of the page depending on a context change.
  • You possibly have to execute SVG
  • You possibly have to concentrate on control after a validation error

And this list of possibilities goes on. When you find these possible situations while using the platform, you opt for the easy way to escape and finally manipulate the DOM directly.

In order to prevent yourself from altering the DOM directly, use jQuery, a global document object or ElementRef.nativeElement. Otherwise, you can utilize the Renderer2 service. All in all, you need to resist yourself from making changes to the DOM directly.

5. Acknowledging the Same Component in Multiple NgModule

Acknowledging a component in many NgModules is one of the most common mistakes done by the Angular developers. In an Angular app, a component is the basic building element.

Each component should be acknowledged in a NgModule for being available to viewers. You need to list a component in the @NgModule.declarations array to particularize that it’s a member of a NgModule. Hence, being an Angular developer, you should acknowledge every component in its own NgModule.

If you want to announce a similar component in different modules, you will have to take the connection between those modules into account.

In case this is a parent-child connection, then:

  • Utilize the NgModule.declaration of the child for acknowledging the HeroComponent in the child module.
  • Next, utilize the NgModule.exports array of the child for exporting that HeroComponent.
  • Finally, utilize the NgModule.imports array of the parent for importing the child module.

In case it is not regarding a parent-child module connection, you will have to acknowledge another NgModule as the shared information’s module.

6. Failing to Examine

Overlooking to examine an app prior to launching it is a common pitfall of the Angular developers as they do not realize the matter that bugs can be launched by many environments.

You don’t have to obtain an environment with each OS; instead, you need to examine your app with the use of well-known cross-browser testing tools.

7. Settled Scope Binding

Usually, the Angular framework possesses its own scoping principles. For instance, the easy application of data sources restricted to a model can actuate mishap in the binding system.

Nevertheless, the difficulties arrive to ensure that the names are completely overhauled. In Angular, references pass the non-primitives while the value passes the primitives. In order to fix this issue completely, a developer should assemble all scope objects precisely.

8. Not Practicing $applyAsync

Since in Angular, there is $digest (), a polling method, it is just applied due to the existing directives. $applyAsync supports much in maintaining the code’s expressiveness in the following cycle of the $digest (). You can opt for both manual and automated ways for practicing $applyAsync.

9. Inappropriate Use of Event Handlers

When it comes to adding functionality found on predicted data like featuring a button depending on user input, Angular can be especially perfect. Nevertheless, this does not go with one of the fundamental rules of the Angular framework, which is to place all the display and logic in order.

10. Forgetting to Use Batarang

Batarang is an exceptional Google Chrome extension which the Angular developers employ to debug and build Angular apps. This extension is really helpful while applying on abstracting scopes where restricted arguments are found. Failing to use this extension tool is one of the most common mistakes committed by Angular developers.

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The Final Say

It’s quite normal to make a mistake and everyone does it. In fact, when a developer writes some codes and read them later, they often even don’t understand why they wrote those codes like that way. It will be the biggest pitfall to avoid your mistake.

A developer needs to boost his/her skill on a constant basis. Since we learn from our mistakes, a developer also becomes better and stronger after making mistakes. Angular developers should note down their mistakes, create a list of them and make sure they don’t make the same previous mistakes again by writing all codes precisely.

Paresh Solanki

Paresh Solanki

Paresh Solanki is a Technical Head at Mindinventory. He started his career as PHP developer and have expertise in Node, Linux Administration, Angular, IONIC, React-Native, Laravel, CakePHP, CodeIgniter, Meteor, ReactJS and many other JS frameworks. Currently having his hands on Go Language, Python, RoR and Flutter.

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