In last five years, AngularJS has been evolved tremendously. It has advanced from Angular version 1.0 to Angular version 2.0 and now Angular version 4.0. The AngularJS Development Company makes use of the features provided by the Angular 1.0 to 4.0 which brought major improvements of the developed code size. It provide great impact on application performance and security. The migration has been quite smooth for the AngularJS developers.

Why skipped Angular 3

angular packages

To prevent conflict of the router package version, the Angular team decided to skip the version 3 go straight for Angular v4. In this way again, all the core packages are aligned which will be easier to maintain and help avoid confusion in the future.

Major differences between Angular 1 vs Angular 2 vs Angular 4

Angular 1 vs Angular 2 vs Angular 4

Architecture

Version 1.0 vs. Version 2.0

Angular 2 shows a substantial change in the structure as compared to version 1.0. The architecture of AngularJS is based on MVC whereas the architecture of Angular 2 is based on service/controller. There is very less possibility to upgrade the Angular 1 to 2, mainly developers have to rewrite the entire application code.

Version 2.0 vs. Version 4.0

Upgrade of the version from 2.0 to 4.0 has reduced it’s bundled file size by 60%. The code generated is reduced and has accelerated the application development. Here the developed code can be used for prod mode and debug.

JavaScript and TypeScript

v 1.0 vs. v 2.0

Angular JS use JavaScript to build the application while from Angular v2.0 angular team introduced the typescript to write the application. TypeScript is a superset of JavaScript which helps to build more robust and structured code. Dart can be used by developers along with TypeScript in version 2.0.

v 2.0 vs. v 4.0

Angular v4.0 is compatible with newer versions TypeScript 2.1 and TypeScript 2.2. This helps with better type checking and also enhanced IDE features for Visual Studio Code.

Mobile Support

Angular 2.0 has made it possible to accomplish the native applications for a mobile platform like React Native. Angular 2.0 provides application layer and the rendering layer. As need, any view can be rendered in runtime for the required component.

Component-based UI

1.0 vs. 2.0

The controller concept which was present in Angular v1.0 is eliminated in Angular v2.0. Angular v2.0 has changed to component based UI. This helps a developer to divide the applications in terms of components with desired features and enable to call required UI. These have helped to improve the flexibility and reusability as compared to Angular v1.0

SEO Friendly

1.0 vs. 2.0

With AngularJS development the search engine friendly Single Page Applications was the major difficulty. But this bottleneck was eliminated in Angular v2.0. AngularJS development services build SEO friendly Single Page Applications by rendering the HTML at the server side.

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