What is the difference between Angular 2 and Angular 4? -

What is the difference between Angular 2 and Angular 4? 

Comparison between Angular 2 and Angular 4:

	Angular 2	Angular 4
Program	Angular	Angular
Launched	September 14, 2016	March 23, 2017
Backward Compatibility	Not compatible with AngularJS.	Angular 4 is backward compatible with Angular 2
Compatibility with TypeScript	Compatible with TypeScript 2.0. Not compatible with TypeScript 2.1 and TypeScript 2.2.	Compatible with TypeScript 2.1 and TypeScript 2.2
File Size	60% larger bundled file size as compared to Angular 2	60% Reduced bundled file size as compared to Angular 4
Directives and controls	Limited directives and controls	New directives and controls
Component splitting features	Limited to no component splitting features	Component splitting features
Code reusability	Limited code reusability	Increased code reusability
Application development	Slower application development as compared to Angular 4	Accelerated application development as compared to Angular 2
Ahead of Time (AOT)	No Ahead of Time (AOT)	Introduced Ahead of Time (AOT)
View Engine	No view engine	Introduced view engine
Animation Function	The Angular animation function requires the @angular/code module, essentially creating its own package.	Animation package is not required, which reduces the size of the code.
*ngIf and *ngFor	Limited *ngIf and *ngFor. Can’t utilize an if/else design syntax, and assign local variables	Improved *ngIf and *ngFor. Can utilize an if/else design syntax, and assign local variables like if to unroll an observable
Angular Universal	Does not contain the external and internal work from Universal	Contains the external and internal work from Universal
Source maps	Does not contain source maps	Source maps that provide a meaningful context concerning the original template

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About Mariano

I'm Ethan Mariano a software engineer by profession and reader/writter by passion.I have good understanding and knowledge of AngularJS, Database, javascript, web development, digital marketing and exploring other technologies related to Software development.