I am clarifying this question after I have been developing SPA for the past 5 months using AngualrJS. In the beginning, I was researching if I should start with Angular 2 instead.
During my research, I came across this article:
https://angular.jsnews.io/why-learning-angular-2-was-excruciating/
https://hackernoon.com/why-learning-angular-2-was-excruciating-d50dc28acc8a
I then realized that I have faced a lot of the issues referenced in that article.
Also, when I started with the offical Angular websites https://angularjs.org/ and https://angular.io/ and followed the recommendation:
I spent several days using the various resources learning Angular 2 based on the above websites and faced a lot of difficulties. I remember I started with this 5 MIN QUICKSTART:
http://a2.hubwiz.com/docs/ts/latest/quickstart.html
Which took me several hours to complete, with several scary error messages in red color.
Later, I started using other resources such as w3schools.com and stackoverflow.com, and I see mostly reference to script tag as follows:
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
Which is clear that it was referencing AngularJS. Finally, I realized that learning Angular 2 to start taking advantage of the newly added feature, will cost me a lot of time and effort. Finally, I decided to stay with AngularJS especially I was able to find a solution to each and every business requirement for the complex Forms Application Development I was working on.
Also, I read the other post which is suggested as an answer for my question. What is mentioned there is that Angular 2 is in developer preview:
However, the official websites doesn't mention that. So, the post above is not relevant anymore and I cannot depend on it.
So my recommendation, if you have enough time to spend in learning Angular 2 and deal with the issues that might show-up then of course this is the recommended path, otherwise, best to stay with AngualrJS.
Tarek
