JavaScript how to use scroll event in angular material mat select? scroll event angular 7,scroll event angular 8,scroll event

i have a large list and i want to load it as the user scroll down the select field but how can i get the scroll event in mat-select there is no event that fire the scroll event.

<mat-form-field>
  <mat-select placeholder="Choose a Doctor" formControlName="selectedDoc" (change)="drSelected()">
    <div *ngFor="let dr of doctors;let i = index" [matTooltip]="getDocDetail(i)" matTooltipPosition="right">
      <mat-option (scroll)="docScroll()" [value]="dr">
        {{dr.name}}
      </mat-option>
    </div>
  </mat-select>
  <mat-hint>List Of Doctor In Your city</mat-hint>
  <mat-error *ngIf="selectedDoc.hasError('required')">Please Select A Dr</mat-error>
</mat-form-field>

(scroll) don't work because mat-select don't have any scroll event any other way i can achieve this i want to show like 10 item first then populate the rest item when user scroll end of the options .

Answer:1

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