ngif-directive.md

The *ngIf Directive

The else Block

<div *ngIf="condition; else elseBlock">that's true</div>
<ng-template #elseBlock>that's else</ng-template>

The if then...else Struct

<div *ngIf="condition; then thenBlock else elseBlock"></div>
<ng-template #thenBlock>that's true</ng-template>
<ng-template #elseBlock>that's false</ng-template>

Storing a value locally

<div *ngIf="condition as value">{{ value }}</div>

<div *ngIf="condition as value; else elseBlock">that's {{ value }}</div>
<ng-template #elseBlock>that's false</ng-template>

<div *ngIf="condition as value; then thenBlock else elseBlock"></div>
<ng-template #thenBlock let-val>that's {{ val }}</ng-template>
<ng-template #elseBlock>that's false</ng-template>

Piped, Async etc. Included

<div *ngIf="userObservable | async as user; else loading">
	Hello {{ user.first }} {{ user.last }}!
</div>
<ng-template #loading let-user>Waiting... (user is {{ user|json }})</ng-template>