CODE EXAMPLE FOR JAVASCRIPT

mat checkbox change event in angular 7

whTax =false;                  
<mat-checkbox color="primary"
                      name="whTax" [checked]="false"
                      [(ngModel)]="whTax" id="IsHold"
                      (change)="onWHChange(whTax)">
                        W/H TAX
                  </mat-checkbox>
    onWHChange(isWhChecked){
      console.log('isWhChecked:>>', isWhChecked);
    }