<table mdbTable class="z-depth-1">
<thead>
  <tr>
    <th *ngFor="let head of headElements; let i = index" scope="col" [mdbTableSort]="elements" [sortBy]="headElements[i]">{{head}}
      <mdb-icon fas icon="sort"></mdb-icon>
    </th>
  </tr>
</thead>
<tbody>
  <tr *ngFor="let el of elements; let i = index">
    <th scope="row">{{el.id}}</th>
    <td>{{el.companyname}}</td>
  </tr>
</tbody>

Can't bind to 'mdbTableSort' since it isn't a known property of 'th'. ("

Any help with this?