AngularJS is a modern front-end framework designed by following the MVC pattern for developing Single Page Applications(SPA) rapidly. AngularJS2 is an innovative and dynamic update from the previous version of the framework. The updated framework comes with an overall enhanced performance, making AngularJS2 apps run much faster than the previous versions. This upgraded framework will have a prime focus to develop mobile apps and also targets the ES6 and “evergreen” modern browsers.

The Upgrades

Usage of AtScript

AtScript is a superset of ES6 and is processed by Traceur compiler and uses TypeScript’s type syntax to generate runtime type assertions.

Improved Dependancy Injection

Dependency injection was one of the unique factors that were able to differentiated Angular from the rest of the framework, but its implementation was plagued with problems. The new version will address these issues, as well as adding missing features such as child injectors and lifetime/scope control.

Templates and Data Binding

These two components, templates, and data binding, work simultaneously during the development of applications and was lacking with regards to dynamic loading. The latest framework has addressed this issue and will allow AngularJS developers to add new directives or controllers. With regards to the template compilation process, AngularJS2 has made it asynchronous. Components, decorator, and templates are the three directives present in the new version.

Advanced Routing Solutions

The router used in the older version of the AngularJs was designed mainly to handle few simple cases. As the framework grew, multiple features were integrated and required a much more adequate router. The router present in the AngularJS2 has been reworked with a perfect blend of existing features like simple JSON-based route config, optional convention over configuration, static, parameterized and splat route patterns, URL resolver, query string support, etc., and with new features like screen activator and child router.

Efficient Log

The new logging service for Angular2.0 is called diary.js. It helps in keeping track of the time and which part of the application takes more time to process.

Conclusion

The excluded feature in the new version is the $scope and it was removed to favor the ES6 classes. Multiple Angularjs development companies were worried that there was no mention of a migration path to 2.0. They thought, jumping to the new version may break the apps created using Angular 1.3.