modal-example-backdrops.html

<button class="btn btn-primary" (click)="defaultModal.show()">Modal With Backdrop</button>
<ng-template nzbModal #defaultModal="nzbModal">
  <!-- No attribute necessary -- same as data-backdrop="true" -->
  <div class="modal fade" tabindex="-1">...</div>
</ng-template>


<button class="btn btn-primary" (click)="noBackdropModal.show()">Modal Without Backdrop</button>
 <ng-template nzbModal #noBackdropModal="nzbModal">
  <div class="modal fade" tabindex="-1" data-backdrop="false">...</div>
</ng-template>

<button class="btn btn-primary" (click)="staticBackdropModal.show()">Modal With Static Backdrop</button>
<ng-template nzbModal #staticBackdropModal="nzbModal">
  <div class="modal fade" tabindex="-1" data-backdrop="static">...</div>
</ng-template>