<mat-sidenav-container class="example-container" *ngIf="shouldRun">
<mat-sidenav mode="side" opened="true">Sidenav content</mat-sidenav>
<mat-sidenav-content>Main content</mat-sidenav-content>
</mat-sidenav-container>
<div *ngIf="!shouldRun">Please open on Stackblitz to see result</div>