ngSwitchDefault
is optional.
<div [ngSwitch] = "position">
<div *ngSwitchCase = "1">You are 1st!</div>
<div *ngSwitchCase = "2">You are 2nd!</div>
<div *ngSwitchCase = "3">You are 3rd!</div>
<div *ngSwitchDefault>You are not worth mentioning!</div>
</div>