Angular Best Practices To Improve App Performance

When it comes to building dynamics web applications, no other front-end javascript technology can be matched with the performance of any web application.

If we count in the basics, the prominent blocks of Angular are components, metadata, modules, and data binding directives. When everything comes into the sink, the performance of any AngularJS Application can reach the skies in the least amount of effort!

This blog will talk about a few best practices of AngularJS Applications that can transform your mediocre application into the best performing one. Our research for finding these practices has covered the wide spectrum of every internal platform of creating and building single-page applications utilizing typescript, HTML, and CSS.

In a nutshell, we will cover every dynamic to build more robust and compatible UI applications.

Before digging in, it’s crucial to understand the core features of AngularJS. From modular structure to Angular CLI and Angular Router. By applying the optimized technics to this arena of AngularJS web apps, we can enhance our performance.

Let’s explore each best practice in detail.

Utilising trackby with ngFor

To remove the DOM *ngFor directive without trackby. In the DOM tree, it will recreate the elements again and will gain a lot more data. This will eventually slow the application down. 

To avoid such mess, it is wise to use trackby with the *ngFor directive.

The component.ts file:

trackByBookCode(index: number, book: any): string {

return book.code;


Using Lazy Loading

Lazy loading is just a cycle of processing various modules like CSS, JS, Images, and videos.

Lazy loading basically works on applications load time by dividing them into multiple bunches and loading them as requested. 

This way is pretty optimised other than utilizing other functions to lazy load the module. This feature will come in handy when it comes to large-sized applications.


Avoid ‘Any’ type

To lower the unexpected issues in your app, avoid the ‘Any’ type. This practice will also make the refactoring uncomplicated and neat.

To avoid such a mess, Angular Developer should use only certain variables. Moreover, defining your variables will give a proper structure to the program.

Cache API calls

By limiting the server requests, you are saving space and improving the performance. Few API responses may not change over time; hence, some caching mechanisms can store the values from those significant APIs.

Therefore, when the request has been made from the server, we can opt for the response from the cache.

This practice will ensure that we are not downloading the same information more than once. So, in the end, it will speed up the application rapidly.


Preventing Memory leaks

When the navigation process commences from one component to another, the first component is destroyed and initialized. 

Apart from this, the other thing that happens is the memory leaks can happen as the first component has been observed where the other second component has been destroyed.

These memory leaks can be prevented by,

  • Using takeUntil()

  • Using take(1)

  • Using the Async pipe

These were some of the major best practices to consider. However, other subtle yet vital changes are worth mentioning.

These are like those chocolate flakes on the dessert that are not mandatory, but having them on the cake will make it taste exquisite.

  • Avoid implementing subscriptions inside of subscriptions
  • Utilising proper keywords
  • Maintain the proper folder structure
  • For consistent and decent code, use Lint rules
  • Using Environment variables
  • Avoid using logic in templates
  • Prefer using Index.ts often.
  • To enhance the performance, use CDK virtual scroll
  • Stick to the standard coding style format
  • Explore and adopt EC6 features as per your project needs

Building an extensive AngularJS application is not an easy task to get done with. There are mistakes that we do by doing by ourselves, and there are mistakes that we learn from the mistakes of others. These were some of the best practices that I have acquired during the projects our team has handled and years of programming in AngularJS. To enhance the performance of your AngularJS project by giving it top-class resources ,you should Hire Angular Developer from one of the top Result-oriented Angular Development Companies! Or try Angular out for yourself.

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