<button
    id="add_new_process_content_button"
    color="primary"
    mat-button
    mat-raised-button
    mat-icon-button
    class="adf-create-attachment"
    adf-upload="true"
    [mode]="['click']"
    [multiple]="true"
    (upload-files)="onFileUpload($event)">
    <mat-icon>add</mat-icon>
</button>