typescript - How to access global js variable in angular2 component

Question

I have a global js variable defined below (@Url is an ASP.Net MVC html helper it will get converted to a string value):

<script>
  var rootVar = '@Url.Action("Index","Home",new { Area = ""}, null)';
  System.import('app').catch(function(err){ console.error(err); });
</script>

How do I access rootVar in an angular2 component? I used to use the window service in angular 1.5, is there an analogous way of doing that in angular2?

Specifically, I want to use that rootVar variable to help generate the templateUrl in this component:

import { Component, Inject} from '@angular/core';

@Component({
    selector: 'home-comp',
    templateUrl: '../Home/Root'
})

export class HomeComponent {   
    constructor( ) {  }
}

Answer 1

Within your component you could reference window to access the global variables like so:

rootVar = window["rootVar"];

or

let rootVar = window["rootVar"];