Angular 4 has been released and now available for download, it is a major release after 2.x.x and it is backward compatible with 2.x.x. What is new in Angular 4 Angular 4 is smaller and faster than 2.x.x version as per the official post by angular over all its reduce by 60% of the size of the generated component code. Animation package has been taken out from @angular/core and bundled inside their own package. So if anyone not using the animation then it reduces the size of your package. However, animation can be added by importing the BrowserAnimationsModule from @angular/platform-browser/animations to your main NgModule. There are many more features which have been updated in the Angular 4 you can check out more here . How to upgrade to Angular 4 For updating to angular 4 follow the below steps. On Linux/Mac: npm install @angular/{common,compiler,compiler-cli,core,forms,http,platform-browser,platform-browser-dynamic,platform-server,router,animations}@latest typescript@latest --save O...