<div class="alain-default__content-title">
  <h1>Download a file</h1>
</div>
<nz-card nzTitle="DEMO">
  <button nz-button *ngFor="let i of fileTypes" class="mr-sm" down-file [http-data]="data" http-url="assets/tmp/demo{{i}}" file-name="demo中文">{{i}}</button>
</nz-card>
