How to bind to model with Angular Material ?

Question

Take a look at this Plunker: https://plnkr.co/edit/yu95hUrKlUh4Ttc5SwYD?p=preview

When I\'m using , I am able to modify the valu

Answer 1

public selectedVal: string;
constructor() { }

ngOnInit(){
  this.selectedVal ='option1';
} 

public onValChange(val: string) {
  this.selectedVal = val;
}

 <mat-button-toggle-group #group="matButtonToggleGroup" [value]="selectedVal" (change)="onValChange(group.value)" >
  <mat-button-toggle value="option1">
    Option 1
  </mat-button-toggle>
  <mat-button-toggle value="option2">
    Option 2
  </mat-button-toggle>
</mat-button-toggle-group>