JAVASCRIPT

hide element when pressing button angular

<div class="yourCssClass" *ngIf="this.isButtonVisible" (click)="this.isButtonVisible = false">
...
</div>

Your TypeScript

export class AppComponent {
   private isButtonVisible = true;
}

Hide angular element on button click

<button (click)="isShowInfo = !isShowInfo">Toggle me</button>

<div *ngIf="isShowInfo">
   <p>Here is my info</p>
</div>