Angular 4 NgIf

Angular 5 and 4 NgIf Then Else Examples

What Is ng-template Element in Angular 5 and 4?
The “<ng-template></ng-template>” is an angular element for rendering HTML. It is never displayed directly. Suppose we have following code in our HTML template.

The “<ng-template></ng-template>” is used by structural directive such as NgIf.
Stayed Informed – Angular 5 and Angular 4 Documents

Example -
<!--ng-template -->
<ng-template>
    <h2>Hello, Anil!</h2>
</ng-template>

When the above code runs then the code written inside <ng-template> will not be displayed. It writes a comment.

What Is NgIf then Else in Angular 5 and 4?
The NgIf directive is structural directives which use to add or remove the DOM element and it does perform in DOM layout at run time.

Example –
<!-- ngIf condition -->
<div *ngIf="condition">...</div>

<!-- ngIf with template and condition -->
<div template="ngIf condition">....</div>

<!-- ngIf with ng-template and condition -->
<ng-template [ngIf]="condition"><div>....</div></ng-template>


And
//ngIf Else
<div *ngIf="Age > 18; else notEligible">
    <h2>Eligible to watch.</h2>
 </div>
 <ng-template #notEligible>
    <b>Not Eligible to watch.</b>
 </ng-template>



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ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
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