ipsos-components/src/material-examples/select-reset/select-reset-example.html

Material Design components for Angular

<mat-form-field>
  <mat-select placeholder="State">
    <mat-option>None</mat-option>
    <mat-option *ngFor="let state of states" [value]="state">{{state}}</mat-option>
  </mat-select>
</mat-form-field>