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 ChangesNew 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.Fa