This project was generated with Angular CLI version 1.7.3.
Run npm install bootstrap@3 --save We used bootstrap version 3 only.
Run npm install ngx-bootstrap --save We used date picker which is supported for all browsers equally import in app.module and then use it
has-error: for div tag control-label: for label tag help-block: for span tag
[class.has-error]="*ngIf condition"