show hide using id angular 6 code example

Example 1: hide and show in angular 8

<button (click)="toggleShow()" type="checkbox" >show/hide</button>

<div *ngIf="isShown" class="row container-fluid"  id="divshow" >
Div Content

</div>

Example 2: hide button in typescript

var link = document.getElementById('nav-ask');
link.style.display = 'none'; //or
link.style.visibility = 'hidden';