// include bootstrap - both v3 and v4 are supported  // if not using bootstrap you could implement the popover styles yourself import 'bootstrap/dist/css/bootstrap.css'; import { NgModule, Component } from '@angular/core'; import { ConfirmationPopoverModule } from 'angular-confirmation-popover';  // first add it to your apps module @NgModule({   declarations: [MyComponent],   imports: [     ConfirmationPopoverModule.forRoot({       confirmButtonType: 'danger' // set defaults here     })   ],   bootstrap: [MyComponent] }) class MyModule {}  // now use it within your component @Component({   selector: 'my-component',   template: `     <button       class="btn btn-default"       mwlConfirmationPopover       [popoverTitle]="popoverTitle"       [popoverMessage]="popoverMessage"       placement="left"       (confirm)="confirmClicked = true"       (cancel)="cancelClicked = true">       Click me!     </button>   ` }) class MyComponent {   public popoverTitle: string = 'Popover title';   public popoverMessage: string = 'Popover description';   public confirmClicked: boolean = false;   public cancelClicked: boolean = false; }