AngularJS was developed to make applications more interactive for the end user.It was designed to overcome the limitations of HTML.HTML is suitable for creating applications to just display the documents.
Angular 2 is a platform for building web and mobile applications.So we can build variety of applications in angular 2 from web applications to mobile applications.
Advantages of Angular JS 2.0
Following are some of the distinguishing features of Angular 2.These advantages of Angular JS 2.0 are introduced considering the changing nature of the web.Web has changed a lot since the initial release of AngularJS.So Angular 1 or AngularJS was designed considering the current nature of the web.
Applications developed in Angular 2 have wider reach:
Angular JS 2.0 is designed with approach mobile first.
We can create applications for the web using Angular 2 which will work on different platform such as iOS and windows.
Responsive applications for web and mobile
Angular 2 web applications are responsive so that they will work on different devices.
Native applications for ios and android
Native mobile applications are optimized for specific mobile platforms such as iOS and Android.So native mobile applications build with angular are better in terms of performance.
Angular works with Typescript which is a strongly language.By using TypeScript developers can develop object oriented applications in Angular 2.TypeScript allows developers to use language features such as classes and interfaces while developing Angular 2 applications.
Server side rendering
Server side rendering improves the speed of page rendering since the rendering happens on the server instead of client.So if the page is being rendered on a mobile device then server side rendering could have significant impact on the page load time.
Server side rendering means that the HTML is generated on the server rather the browser which results in improved application response time.
Server side rendering improves the initial page load time on the server.
Also in some scenarios initial page load could be very slow:
- if there is a slow web service call
- if the rendered html is complicated
Server side rendering is useful in such scenarios.
Also server side rendering is better from SEO perspective.
Faster web applications.
Angular 2 is 2.5 times faster than angular 1
There is no digest cycle in angular 2.Digest cycle means that even for a change in single expression all the expressions in our application are re-evaluated.This impacts the performance of the application.Angular 2 has better mechanism for handling such changes ,using change detection mechanism.
Every component in angular 2 has a change detector which re renders the view whenever the component gets changed.
Less learning curve
For learning how to develop application in Angular 2 refer Starting with Angular 2