Developing an Angular app is a tricky job, especially an enterprise app. Angular developers may make mistakes when they are coding. They are often unaware of the errors they have made and find it hard to identify them. These mistakes can be very costly and time-consuming to fix, a major cost for an organisation. If you are looking to hire Angular developers, then do refer us.
In this blog, you will find the most common mistakes of angular developers. We intend to make you aware of these mistakes so that you don’t commit to your next project.
1. Failing To Unsubscribe
Oftentimes Angular developers forget to unsubscribe for observables or any other events in your Angular application. If you are not unsubscribing to those events, it may lead to memory leaks across the entire system. Thus a developer should fix it immediately in the initial stage before it causes major glitches.
You can solve this glitch in the following ways:
- Start the onDestroy LifeCycle
- Start the LifeCycle hook
Code Sample
// code start
import { Component, OnInit, OnDestroy } from ‘@angular/core’;
import { Observable } from ‘rxjs/Observable’;
@Component({ … })
export class AppComponent implements OnInit, OnDestroy {
destroy$: Subject<boolean> = new Subject<boolean>();
ngOnInit() {
this.postSerive.getAllPosts()
.takeUntil(this.destroy$)
.subscribe(({data}) => {
console.log(data);
});
}
ngOnDestroy() {
this.destroy$.next(true);
// Now let’s unsubscribe from the subject:
this.destroy$.unsubscribe();
}
}
- Declaring Unnamed Functions
Sometimes angular developers may fail to assign functions in the right manner at the time of coding. It is important to achieve neat, clean, bug-free, uncluttered and easily maintainable code. If a developer sticks to this practice, it helps them save time in testing, and deployment will be smooth.
- Tuning To Client-Side Rendering
In Client-side rendering, a developer has to load all the application data, so it may be overwhelming while dealing with enterprise applications. In order to solve this issue, a developer should use server-side rendering; no such data is to be uploaded. Here, the system can load the specific page number and load the specific page’s record as per the inputs.
- Not Compartmentalising Angular Code Properly
The main part of Angular coding is Compartmentalising. When working with MVC, you have a controller for a view. The controller is the rationale layer, and it is compulsory to make compact compartments for each area of application.
This is how code organization is done in Angular. It may not seem important to you while coding but failing to do so has serious complications at the time of deployment and operations.
When working in a team, it’s easier to organize your code, so make sure you do it.
- Going Back To jQuery
jQuery is a library for doing DOM manipulations and handling events. As opposed, Angular is used to develop scalable applications; hence, there is no match between these technologies. Angular is far more advanced than jQuery. Thus it won’t do good to your Angular application if you use it. You should not even use it for DOM manipulations.
- Introducing Changes to the DOM Directly
DOM is the main structure of a web page. It is responsible for containing the HTML, CSS and JavaScript code of a webpage. Angular developers often change some parts of DOM directly without using any other tools.
Angular developers often make changes to the DOM directly. These changes can be very costly in terms of time and resources because they are not easy to test. For example, if you change the data of a table in the DOM, you need to make sure that the changes are reflected in the UI of your application. This means that you need to make sure that your code works correctly on every device and platform it runs on. The only way to do this is by making sure that it works correctly on all platforms and devices at once (i.e., testing).
Making could lead to bugs or, even worse – glitches that could result in security vulnerabilities or application crashes!
- Not Testing Code Before Deployment
Angular applications can be very complex and difficult to maintain compared to other frameworks such as jQuery or Ruby on Rails. This makes it hard for developers to keep track of what went wrong when they make changes in an Angular application and how they can fix them if they do happen again. So they need a way to test our Angular application before we launch it into production mode so that they can quickly identify any bugs that may be affecting our app’s functionality or performance before they deploy it to live servers.
- Acknowledging The Same Component Multiple Times
Components are the main element of Angular application. Every component has to be declared in the NgModule declaration array. You can only declare one component in one NGmodule; there is no exception. Even if you try to do so, you will get an error.
If you want to use a single component in multiple modules, the best way is to move the component to shared modules along with a declarations array and exports array.
After doing so, you can import the sharedModule wherever you want.
Here is the example: Declaring and exporting PostComponent in SharedModule
NgModule({
declarations: [PostComponent],
exports: [PostComponent]
}
export class SharedModule { … }
// importing SharedModule in ArticlesModule
NgModule({
imports: [SharedModule]
}
export class ArticlesModule { … }
// importing SharedModule in NewsModule
@NgModule({
imports: [SharedModule]
}
export class NewsModule { … }
- Not Making Use Of Tools
When hiring angular developers, you should ask them whether they know how to use third-party tools or not. If not, you should not hire them because these tools make the angular development process too easy and save a lot of time for developers.
- Not Using Event Handlers Properly
In the case of adding functionality on predicted data, like featuring a button depending on user input, angular will be perfect. However, this may not conform to the fundamental rules of the Angular framework, which is about placing all the display and logic in the right manner.
- Not Making Use Of Batarang
Batarang is an application that helps angular developers to write better code. Batarang gives developers access to all the tools they need, including syntax highlighting, autocompletion, refactoring, and code formatting tools with a simple drag-and-drop interface. The best thing about using Batarang is that it runs in the browser, so you can edit your angular component in any browser environment like Chrome or Firefox.
Not using Batarang is considered a mistake by Angular developers.
Over To you
So These were the most common mistakes of angular developers. We are hoping after reading this blog, you won’t commit it while developing your angular app. For more information on how not to make mistakes in angular app development, kindly visit our website. You can also hire our angular developers at your service.
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