Why should we migrate into angular from angularjs

Perform like never before

The migration’s main advantage is its boost in performance, since angular is 5 times faster than Angular JS. As Stephen says, you can begin server-rendering your application. “You are looking for better runtime performance.”

During the release candidate period, it was noted that numerous developers reduced their final bundles’ size after migrating to the latest version. To accomplish this, the Angular team made some changes to the AOT. With the “Ahead-Of-Time Compilation”, the application is compiled prior to being sent to the browser by the angular compiler. As a result, it’s easier to download the code. Besides, the browser can execute it faster due to that reduced compilation time.

Also, some specific packages (i.e. animations) were separated from the angular core package. Therefore, the app is lighter in size and faster to run. Likewise, this brings security benefits. The application is less prone to injection attacks, as AOT compiles HTML templates into JavaScript files, removing those templates from the final bundle.

Go Mobile with Angular
Another plus is its mobile-driven approach. Unlike version 1.x, latest versions were designed to create native mobile apps by using strategies from other mobile-oriented frameworks such as Nativescript, Ionic Framework or React Native. For example, lazy loading makes Angular compile different modules when they are actually needed instead of compiling all the application at once. It makes the resulting code lighter and faster to download. Moreover, the framework’s improvement in performance will make the mobile application way smoother than it could have been if it had been developed by AngularJS.

Execute better with components
Moreover, the general structure of Angular applications (component-based) makes it easier to understand than 1.x versions. This new approach makes developers focus on building classes, called components, which replace the “Views” and “Controllers” that defined Directives from earlier versions. This helps testability and maintainability as concerns are clearly separated and tests are easier to write.

Along with these changes, the fact that the framework is written in Typescript (a typed superset of JavaScript) helps reduce runtime errors as mistakes can be found before transpiring. This may also help developers experienced in OOP (i.e. C#) learn the framework faster as the syntax and approach is similar to that kind of language. Stephen guarantees that by migrating, you can also take advantage of powerful new capabilities. Some of them are ES2016 syntax, Code Splitting and PWAs. “Moreover, 3rd party tools you rely on are thinking about moving away from AngularJS and towards Angular,” he says.

Migrate smoothly
Finally, another central benefit is the fact that both frameworks could live in the same application. Therefore, it can help developers to upgrade it gradually. Also, it allows third party libraries used in AngularJS to continue working after migrating.

So, for the time being, the time to upgrade is now.

These benefits will keep your users thrilled with your apps as a result of them working more smoothly and faster. Moreover, being up-to-date with the latest technology trends will inspire developers to become more motivated and skilled. That’s how Stephen summarizes why your team will definitely be up for migrating to Angular: 



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