How to migrate from Angular JS to Angular

Angular's notable and advanced features make it one of the most prominent frameworks for creating mobile and desktop applications. Its introduction in 2016, with its first-rate features, has made Angular the favorite among front-end and back-end developers. The last few years have witnessed a migration from Angular JS to Angular. One of the primary reasons behind this is that the Angular JS team has ceased their support for the framework along with the critical security fixes. Hence, businesses using Angular JS must migrate their applications to other frameworks, ensuring seamless operation. In this article, we will discuss the benefits and the methodologies of Angular JS to Angular migration.

Differences between Angular JS & Angular

Although there are several similarities between these two front-end, open-source frameworks, vast differences make AngularJS preferable. Let's look at their differences.

 

 

Top 5 Reasons you should Migrate from Angular JS to Angular

One of the possibilities for such migration is that as the demand grew, the core developers improved everything they could, and now they are implementing it successfully. Moreover, it would help if you incorporate a new framework to cope with contemporary requirements for application development. Even though differences between the two frameworks are discussed, more is needed to justify the reasons for migration to Angular. Let's analyze the reasons that you must consider for migrating to Angular.

1.      Architecture

AngularJS had scope and controllers, which were relatively rigid and less reusable. On the other hand, Angular uses an MVC (model-view-controller) architecture, which are based on a hierarchy of components and services. This enables reuse of the elements and improve their testability and maintainability. Angular is preferable for creating a dynamic user interface for an application.

2.      Reduced runtime errors

Angular supports TypeScript, which has an advanced type-checking feature. This feature allows the detection of most bugs at time of building instead of runtime. Ahead-of-time (AOT) and enhanced error reporting compilation also reduce runtime errors.

3.      Support and regular updates

Angular is an updated technology with solid support and regular updates. This aims to ensure your Angular-based app's evolution to meet the fast-growing demands of app users.

4.      Mobile-driven approach

Angular allows developers to build applications that may be downloaded faster. The Angular version uses so-called lazy scripting, which means that it loads particular modules only when they are needed. This enabled lighter and faster performance.

5.      Code optimization

Angular 2x is based on a TypeScript language, unlike the AngularJS application that uses JavaScript code. The former is a superset of ECMAScript 6 (ES6) and has an advanced type-checking feature. This means that most mistakes can be noticed before transpiring. Hence, developers can build large Angular apps and avoid runtime errors.

 

How migrating from Angular JS to Angular will benefit your business?

While we discussed the technical reasons for migrating to Angular, there is also a business angle. The experts at Green Apex believe that Angular can benefit your business in the following ways:

1.      Reduced development time and costs

Programmers can build a web application faster with Angular. AngularJS doesn't have a CLI, and only third-party tools are available. On the other hand, the latest version of Angular has an official CLI and other tools such as text editors, IDEs, etc. This helps developers build an Angular app from the ground up faster and more efficiently.

A reduced development time means fewer costs since programmers usually charge per hour for their work. Moreover, the maintenance of an application based on Angular will likely be cheaper because many more software engineers specialize in this technology, and generally, their rates are lower.

2.      Ease of Maintenance

The architecture of Angular is based on components or services called "modules." The module enables effective organization of application functionalities. All these ensure ease in maintenance when development teams swap one component with another without rewriting the entire code.

3.      Efficient Development

In terms of architecture, structure, and features, Angular is more advanced than AngularJS. The code is cleaner, the architecture is more efficient, and the development process is more productive.

AngularJS is flexible and lightweight for building small applications. However, it fails the test regarding building large, complex applications. Angular is better suited for such. Moreover, Angular supports modern TypeScript over JavaScript, provides support for mobile devices and browsers and has an advanced data binding algorithm. Therefore, what you get is a framework that is more efficient than AngularJS multiple times over.

4.      Mobile-oriented development

According to Statista, the number of unique mobile internet users, in 2021, was 4.32 billion. This indicates that more than 90 percent of the world-wide internet population uses a mobile device to go online. Therefore, mobile internet browsing has been increasingly used growing around the world.

If you have been using AngularJS, you can migrate the AngularJS service to Angular and provide mobile support for your business applications. This has boosted the development of the responsive UI design approach. In fact, search engine giant Google is taking a mobile-first approach to indexing websites on its platform. This means businesses must consider mobile when developing a web application today.

Green Apex's experience with AngularJS to Angular migration

Over the years, we worked on multiple Angular-based projects with material UI lib. Our association with FusePLM occupies the top place in our portfolio list. While working with FusePLM, we started with Angular JS and later converted to Angular.

The backend technology is used as Java REST API, which sets the rules by which these applications interact with each other. Representational State Transfer (REST) is an architectural style used to design distributed hypermedia systems. A REST API refers to an application programming interface that addresses the constraints of the REST architectural style.

The architecture of the product we developed for FusePLM is microservices with Spring and JPA (Spring Data JPA or JPA stands for Java Persistence API). Java microservices are software applications written in the Java programming language. It typically leverages the vast ecosystem of Java tools and frameworks, designed for a limited scope that works with each other to form a more comprehensive solution.

Here is the process Green Apex follows for AngularJS migration to Angular -

Some applications are easier to upgrade, and there are ways to make them more manageable. For the migration, we assess the current code and structure. We make preparation steps for making the code more decoupled, maintainable, and better aligned with modern development tools. If it is an extensive application, we suggest doing it incrementally by running the two frameworks in the same application and porting AngularJS components to Angular individually.

Some key terms you should know for Migrating to Angular

A few summaries of key points to take care of migration are-

1.      Folder structure or component mapping

It defines the type of files and folders we create while designing an Angular project. There are primarily three folders: e2e, node_modules, and src.

2.      AngularJS Style Guide

It refers to a recommended style for AngularJS apps that use Closure, as used internally at Google. The AngularJS Style Guide provides a starting point for development teams to provide consistency through good practices.

3.      Module Loader

An AngularJS module is used to define an application. It is a container for the different parts of an application. The module contains the application controllers; hence, controllers always belong to a module.

4.      Typescript

TypeScript is the main language for Angular application development. It is a superset of JavaScript that supports type safety and tooling.

5.      Component Directives

A component directive has a structured design and a working pattern of how components should be processed, instantiated, and used at runtime. It is the most commonly-used directive in any Angular project and is used to specify the HTML templates.

6.      DI (dependency Injections)

DI, one of the fundamental concepts in Angular, is wired into the framework and allows classes with Angular decorators, such as Components, Directives, Pipes, and Injectables, to build the dependencies they need.

7.      ngRoute management

The ngRoute module of AngularJS provides routing, deep linking services, and directives for angular applications. The module routes your application to different pages without reloading the entire application.

8.      Bootstrapping the UI

Bootstrapping is a functional component in the Core ng module used to start an Angular application manually. It provides more control over the initialization of the application.

Final thoughts

Are you looking to migrate your existing AngularJS-based system to Angular? Migration from AngularJS to Angular is a significant step that requires much effort. Angular is beneficial in many ways as it allows applications to perform better and work faster. It makes the development solutions scalable and easier to maintain. Moreover, the upcoming versions of Angular would prevent the systems from becoming outdated or irrelevant. Green Apex offers the most reliable and efficient Angular migration service to help you keep your system updated. Contact us to avail our top-notch migration service.

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