src/app/completed-components/button-toggle-group/button-toggle/button-toggle.component.html
<div (click)="onClick()" (blur)="onBlur()" (focus)="onFocus()"
[ngClass]="[prefix + '-button-toggle', className]"
[class.active]="isActive"
[class.disabled]="disabled"
[class.focused]="isFocused"
[tabindex]="disabled ? '-1': '0'"
[isRippleActive]="!disabled"
materializeRipple
>
<ng-content></ng-content>
</div>