Is it possible to put a cdkDrag inside a mat-select?

Question

I have a simple mat-select element:

<mat-form-field>
  <mat-select placeholder="Favorite food">
    <mat-option *ngFor="let food of foods" [value]="food.value">
      {{food.viewValue}}
    </mat-option>
  </mat-select>
</mat-form-field>

where in the TypeScript, foods is:

  foods: Food[] = [
    {value: 'steak-0', viewValue: 'Steak'},
    {value: 'pizza-1', viewValue: 'Pizza'},
    {value: 'tacos-2', viewValue: 'Tacos'}
  ];

Is it possible use cdkDrag inside a mat-select element? I'm trying to achieve something like this:

<mat-form-field>
  <mat-select placeholder="Favorite food">
    <div cdkDropList>
      <div *ngFor="let food of foods">
        <span cdkDragHandle>$$$</span>
        <mat-option [value]="food.value" cdkDrag>
          {{food.viewValue}}
        </mat-option>
      </div>
     </div>
  </mat-select>
</mat-form-field>

but I'm having trouble getting the dropdown items to drag. Please help!

Answer 1

Yes! It is possible:

<mat-form-field>
  <mat-select placeholder="Favorite food" multiple>
    <div cdkDropList (cdkDropListDropped)="drop($event)">
      <mat-option *ngFor="let food of foods" [value]="food.value" cdkDrag>
        {{food.viewValue}}
        <span cdkDragHandle>$$$</span>
      </mat-option>
      </div>
  </mat-select>
</mat-form-field>

It looks like the trick is to wrap your mat-options inside a cdkDropList div, so that the drop event (cdkDropListDropped) will fire reliably. Working StackBlitz.