Comparison between Angular JS, Angular 2 and Angular 4

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Among various open-source JavaScript frameworks, Angular is considered one of the best. Angular 1 framework was completely modified and released as Angular 2 by Google’s Angular team. Over the last five years, AngularJS has been evolved enormously. Initially it was known by the name AngularJS version 1.0, and then it evolved to Angular version 2.0 and now Angular version 4.0. 

 For those who are new to Angular or trying to decide which version of angular to learn or for those who want to go for Angular trainings and certifications, , this blog will help you to get a comparison of the three, Angular 1 (AngularJS), Angular 2, and Angular 4.

 Architecture Differences - Version 1.0 vs. Version 2.0 vs. Version 4.0 

Compared to the first version 1.0, Angular 2.0 shows a significant change. The architecture of Angular1 is based on Model View Controller, whereas the architecture of Angular2 is based on components structure, like what we see in React.js. When the upgrade of the version 2.0 to 4.0 was done, the file size was reduced by 60%. As the size of the code generated was reduced, it accelerated the application development. 

File Type
Angular 1 application was built using JavaScript while Angular v2.0 uses the Typescript to write the application, which is a superset of JavaScript. Angular v4.0 is compatible with newer latest version of TypeScript (2.1 and 2.2)

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

SEO Friendly
Creating a search engine friendly Single Page Applications was the major difficulty in Angular 1. But this bottleneck was eliminated in Angular v2.0.The Angular team modified and created a Single Page Application (SPA) which is Search Engine Optimization (SEO) friendly while rendering the HTML on the server-side.

Conclusion
For the Angular beginner, I'd suggest you start your Angular career by joining any best Angular training institutes near you. Under the proper guidance, you will be able to master your skills in Angular.

If interested, read about different Angular training and certifications

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