src/app/demo/custom-single-upload/custom-single-upload.component.html
<div class="upload-box">
<input type="file" id="upload-simple" [accept]="acceptedFiles" (change)="upload($event)">
<label for="upload-simple"><span>{{resultFile ? resultFile.name : buttonText}}</span></label>
<button *ngIf="resultFile" (click)="removeFile()">×</button>
</div>
<progress *ngIf="resultFile" max="100" [value]="resultFile.uploadProgressInPercent"></progress>