Using <ng-template>

app.template.html

<ng-template>
	You will never see me :(
</ng-template>

<ng-template *ngIf="showContents">
	You still won’t see me (even though I’m using a structural directive, there’s nothing that's telling Angular to use me)
</ng-template>

<ng-template *ngFor="let item of items">
	No dice (same reason as *ngIf above)
</ng-template>

<div *ngIf="!showTemplate else template">
	Hello
</div>

<ng-template #template>
	Finally I am seen! (When showTemplate is true)
</ng-template>