<accordion>
   <accordion-group (isOpenChange)="initDatatable()" #ag [isOpen]="true" [panelClass]="'custom-accordion'" class="my-2">
       <button class="btn btn-link btn-block clearfix" accordion-heading>
           <div class="pull-left float-left">
               Direct link to the result (JSON)
               &nbsp;
               <span *ngIf="ag.isOpen"><i class="fas fa-chevron-up"></i></span>
               <span *ngIf="!ag.isOpen"><i class="fas fa-chevron-down"></i></span>
           </div>
       </button>
       <div>
         <p>
            <a target="_blank" [href]="getUrl()">{{ getUrl() }}</a>
         </p>
       </div>
   </accordion-group>
</accordion>