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):

Answer 1

In the component file, outside component class definition, declare rootVar, and it will become available in the component constructor:

declare var rootVar: any;

then

@Component(...)
export class MyComponent {
  private a: any;

  constructor() {
    this.a = rootVar;
  }
}