Check if html th is on focus

[opti13403]

I want to find out wether my HTML Event is on focus (not if it is clicked but focused by navigating with the keyboard).

Code:

myElement === document.activeElement

is only true when the element is clicked but not when it's focused by keyboard navigation.

Code:

    tooltip(){
  var myElement = document.getElementById("myID");
  let myEvent = "";
  if (myElement=== document.activeElement){
     myEvent = "focus";
  }

return myEvent;
};



<th id="myID" *ngSwitchCase="'validation'" tooltipEvent={{tooltip()}} pTooltip="I am a tooltip"
          tooltipPosition="top" [escape]="false"   [pSortableColumn]="column.field" [ngStyle]="column.style">
            <div class="col-title">
            <span data-testid="column-validationl-header" class="ui-column-title" >Validation </span>
              <p-sortIcon [field]="column.field" *ngIf="column.sortable"></p-sortIcon>
            </div>
          </th>

any Ideas?