This project was generated with Angular CLI version 1.2.7.
ng new ng-forms
Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.
angular documentation: https://angular.io/api/forms/FormBuilder
refer to: https://coursetro.com/posts/code/66/Angular-4-Reactive-Forms-Tutorial
with some additions