ng if show loading code example
Example 1: ng if
<ng-template [ngIf]="heroes" [ngIfElse]="loading">
<div class="hero-list">
...
</div>
</ng-template>
<ng-template #loading>
<div>Loading...</div>
</ng-template>
Example 2: ngif
<div *ngIf="condition; else elseBlock">
<button class="xx" *ngIf="flag" (click)="doFunct()">Next</button>
--While (t/f boolean variable called "flag") is true
This button will be visible + click button executes function
Once this "flag" becomes false this button disapears