Skip to content

Instantly share code, notes, and snippets.

Last active August 25, 2017 04:01
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
Star You must be signed in to star a gist
Save badbabykosh/927aff567b360560d82c271db1d32c98 to your computer and use it in GitHub Desktop.
Angular2 vs Angular4

What is the diff between Angular2 and Angular4?

Well there is no path breaking change that means Angular 4 is not a complete rewrite of Angular 2 .

Google has adapted SEMVER (Semantic versioning) approach for it’s Angular Framework.

  • Why not Angular 3?

Due to misalignment of router package version . As @angular/router was using v3.3 already , so they switch to Angular 4 Finally .

  • What has Changed?

Angular team has laid emphasis on making angular apps more faster,compact .

Under the Hood Changes

New changes reduce the size of the generated code for your components by around 60% in most cases.

The more complex your templates are, the higher the savings.

Faster Compilation

Better Bug fixes Alert.

Some changes in Imports/Syntax

  • Animations being pulled out of @angular/core so as to remove the extra code being imported into our production bundle .Though you can easliy add animation by importing {BrowserAnimationsModule} from @angular/platform-browser/animations into NgModule.
  • Renderer 2 in place of Renderer from same ‘@angular/core’.
  • ngIf/else : Now you can use else clause as well .
  • For email validation in Angular forms
  1. Earlier Angular 2 : pattern = “[a-z0-9!#$%&'+/=?^_`{|}~.-]+@a-z0-9?(.a-z0-9?”
  2. Now Angular 4: Now just put email as an attribute to input field where you want to have email id .Here email is an angular directive not to confuse with the type=”email” which is just an HTML DOM type property .
  • TypeScript 2.1 and 2.2 compatibility: Finally We can use typescript 2.1 or more earlier only upto typescript 1.8 was supported.

So that’ s all has changed .


Since the arrival of Angular 2 and Angular 4.The complete framework is referred as Angular not AngularJs as the latter one refers to the Angular1.x framework.

Source : Angular 4.0.0 Now Available

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment