Angular

ngFor

• Used to render a list of objects
• ngFor exports a bunch of values like index, first, last, odd, even.
• alias the exported values using local variables. eg index as i

courses = [
	{id:1, name: "course1"},
	{id:2, name: "course2"},
	{id:3, name: "course3"}
]

<ul>
	<li *ngFor="let course of courses;  index as i; even as isEven">
	{{course.name}} {{i}} <span *ngIf="isEven">EVEN</span>
	</li>
</ul>