AngularJS 1 – Angular 1.x is the initial version of AngularJS. Angular1 introduced many good features. The directive has been considered as one of the best features for reusability, by making the changes in its configuration. AngularJS 1 contains many built-in directives (Eg.: ng-app, ng-if, ng-for etc.) and each directive has its own features. It has model, controller, services, factory, provider, one way and two way data binding, dependency injection, built-in filters etc.
For more details about the features of AngularJS 1, please read the developer guide.
AngularJS 2 – AngularJS2 is the next level upgradation of AngularJS 1. The introduction of AngularJS 2 in the market does not mean that Angular 1 will render less support. AngularJS team is, surely upgrading their framework, but you will have to consider lot of changes that have been introduced in AngularJS 2. Few of them have been mentioned here. These are application workflow, configurations, syntax of data binding and events handling, creating classes, making class export and import, wherever required, just like Java programming, custom directive, replaced with component, and so on.
Comparison Between AngularJS 1 and AngularJS 2
Why Migrate from AngularJS 1 to AngularJS 2?
These are some of the reasons, as a developer, you can migrate from Angular 1 to Angular 2.
Performance: Once you plan to use the new library, technology and framework for development, you will have to look at the performance aspect first. AngularJS 2 has been improved a lot, in terms of performance. (Example: change in its detection method, improved data binding, better event handling and so on.)
Better Mobile Support : As you move from web to mobile world, you will realize that AngularJS 1 is not mobile oriented. AngularJS 2 has complete support for both, web and mobile.
AngularJS 2 is still in the beta version and yet to be fully stabilized.
In today’s world, component structure –based web development is popular and the popularity is likely to increase with time. AngularJS implemented great ideas, and with the technology evolution, AngularJS 2 took over AngularJS 1. In Angular 2, you need to focus on business logic rather than loading modules, adding dependency injection etc. AngularJS 2 is useful for complex web and mobile application development, which leads to the enhanced performance.
To get started on AngularJS 2 and understand the concept in more detail, take a tour of the website by reading the tutorials.
AngularJS developer, RapidValue