How to make all other element hide and only one element will show in IONIC Framework

</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&lt;div [ngSwitch]="authType"&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &lt;ng-template [ngSwitchCase]="'login'"&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &lt;div&gt;Login</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;ion-button &nbsp;(click)="Switchto('signup')"&gt;Signup&lt;/ion-button&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &lt;/div&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &lt;/ng-template&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &lt;ng-template &nbsp;[ngSwitchCase]="'signup'" &gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;div&gt; Signup</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;ion-button &nbsp;(click)="Switchto('login')"&gt;Login&lt;/ion-button&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;ion-button &nbsp;(click)="Switchto('div')"&gt;Div&lt;/ion-button&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;/div&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;/ng-template&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;ng-template &nbsp;[ngSwitchCase]="'div'" &gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;div&gt; 3rd div&lt;/div&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;ion-button &nbsp;(click)="Switchto('signup')"&gt;Signup&lt;/ion-button&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;ion-button &nbsp;(click)="Switchto('login')"&gt;Submit&lt;/ion-button&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;/ng-template&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; &nbsp; &nbsp; &lt;/div&gt;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>

</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp;Switchto(anytype:string){</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; &nbsp; this.authType= anytype;</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>&nbsp; }</p>
<!-- /wp:paragraph -->

<!-- wp:paragraph -->
<p>