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How to Migrate from AngularJS to Angular


The migration from AngularJS to newer versions of Angular has been one of the biggest topics in the business and IT industries for the last few years. In general, most people recognize that the newer the better because it at least considers the modern-day norms. However, many CTOs and business owners are still concerned about updating apps to Angular 2+. Is it merely a market trend or is it actually beneficial? How long do you think it’ll take? Will it necessitate large investments? Etc.

AngularJS was a very popular framework, however with the introduction of Angular, it has become rather obsolete. Transferring Applications from AngularJS to Angular teaches you how to extend the life of your AngularJS applications by migrating them to Angular.

There are several aspects to consider while deciding on the ideal relocation approach for your company. The first logical step is to determine whether the application needs to be entirely redone from the ground up or if it can be upgraded incrementally. Some applications must be rewritten from the ground up when moving from one framework to another, while others merely need to be updated. What are the elements that force you to choose between the two options? These are some of the topics that should be discussed while planning an AngularJS to Angular conversion.

1. Rewrite

Most old applications require rewriting since they are frequently out of touch with modern principles, making migration difficult unless completely new code is written. Even more recent apps, though, may be rewritten for a variety of reasons. For one thing, rewriting gives you more leeway to introduce new features and substantial changes that a simple update might not be able to accommodate. 

However, rewriting takes more time and work, especially because your team will have to manage two different applications at some point in the future to ensure a smooth transition for app users. When considering how to move from AngularJS to Angular, keep in mind that rewriting might be a pain, despite the flexibility it provides.

2. Upgrade

In terms of alternatives for the new application, however, updating is less flexible than rewriting when it comes to migrating AngularJS to Angular or any other platform.

Updating is suitable for large applications whose complexity would result in a significant increase in costs if they were rewritten. It is easier to deliver an update. A hybrid technique, in which various parts of the code are incrementally rebuilt until you have a fully updated code, is a typical adjustment to the update model. That is, you would never have two programs running at the same time. Instead, until the update process is complete, the new and old code coexist. 

Angular’s ngUpgrade library allows you to maintain both frameworks running at the same time. Depending on your goals and priorities, this technology allows for a slow and smooth shift that can last years or be quite short. In a hybrid application, the ngUpgrade library provides capabilities for mixing and matching AngularJS and Angular code. Your development team selects one upgrade path at a time and begins from the ground up. Without affecting the application, ngUpgrade allows Angular and AngularJS to coexist and work together. With its documentation covering the main components of the migrating process, ngUpgrade is a huge assistance.

However, keep in mind that maintaining this hybrid code is more complex. Of course, regardless of which paradigm you choose, the developer should be well-versed in both AngularJS and Angular.

3. Angular Elements

Angular Elements is a new Angular package that lets you turn Angular components into custom elements that browsers can understand. Regardless of framework, it can be consumed anywhere in a browser.

Angular Elements replace the need for ngUpgrade, although they are only useful for very large and complicated applications. Elements alleviated many of the concerns that ngUpgrade would have caused due to their adaptability, availability of the dependency injection system, and autonomy. We now have a method that allows various development teams to migrate features separately and at their own speed.

How do you know which technique is best for your company?

Several aspects should be considered during the decision-making process, including the size of your development team, its capability, and experience, as well as your current AngularJS version. Angular Elements should not be considered by a small team that lacks the means to hire consultants. If you have one of the most recent versions of AngularJS, ngUpgrade might be a good fit for your program; otherwise, rewriting is the way to go.

Angular Elements should be considered by a large firm with a lot of time and resources and a hugely complex application; however, ngUpgrade could also be a viable option.

We at TechAffinity will analyze your software, business, and objectives before creating a detailed plan to carry out the AngularJS to Angular transfer. TechAffinity is a software development firm that focuses on innovation and modernization and, our goal is to bring your legacy applications back to life and make them better than they were before.


AngularJS is a framework that is no longer in use. There is no alternative but to migrate from AngularJS to Angular because of the numerous advantages that Angular will provide. It’s not an issue of whether or not to migrate, but rather when and how. This change is required if you want your application to perform better and faster, and its features to be easy to implement. Our expert developers can help you migrate your existing applications, create new web and mobile applications with the best quality and premium rates. You can shoot your queries to and our team will get in touch with you.

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