<div id="dropZone" [className]="customstyle" [class.over]="dragoverflag"
    (drop)="dropFiles($event)"
    (dragover)="onDragOver($event)" (dragleave)="onDragLeave($event)">
    <div class="content">
        <ng-content></ng-content>
        {{headertext}}
        <div *ngIf="showBrowseBtn">
            <input type="file" #fileSelector (change)="uploadFiles($event)" multiple style="display: none;" />
            <input type="button" class="btn btn-primary btn-xs" value="{{browseBtnLabel}}" (click)="onBrowseButtonClick($event)" />
        </div>        
    </div>
</div>

<div [className]="customstyle" [class.over]="dragoverflag"
    (drop)="dropFiles($event)"
    (dragover)="onDragOver($event)" (dragleave)="onDragLeave($event)">
    <div class="content">
        <ng-content></ng-content>
        {{headertext}}
        <div *ngIf="showBrowseBtn">
            <input type="file" #fileSelector (change)="uploadFiles($event)" multiple style="display: none;" />
            <input type="button" class="btn btn-primary btn-xs" value="{{browseBtnLabel}}" (click)="onBrowseButtonClick($event)" />
        </div>        
    </div>
</div>

Remove obsolete element id 'dropzone'
Remove obsolete element id 'dropzone'
