*ngIf for all sub routes

Question

I want do figure out how I can show a container with *ngIf for all sub routes.

Like for:

<div *ngIf="router.url === /page/**"></div>

So this container is shown when I am at "page" and also for all subpages of "page".

Thanks for your help

Answer 1

    public currentLink: string;

    constructor(private router: Router){

        this.currentLink = this.router.url;

   }
   if(this.currentLink.startsWith('/page/')) this.flag = true;
   else this.flag = false;

  <div *ngIf="flag"></div>

> you can get the URL using observable also