ngForOf

The ngForOf directive (*ngFor) not only provides the index exported value, but it also provides other exported values that can be aliased to local variables.

<li *ngFor="let user of users; index as i; first as isFirst">
  {{i}}/{{users.length}}. {{user}}
  <span *ngIf="isFirst"> default </span>
</li>

Exported values an be aliased to local variables. The following values are exported:

• index: number: The index of the current item in the iterable.
• count: number: The length of the iterable.
• first: boolean: True when the item is the first item in the iterable.
• last: boolean: True when the item is the last item in the iterable.
• even: boolean: True when the item has an even index in the iterable.
• odd: boolean: True when the item has an odd index in the iterable.