Why referencing a window object Branch = window['Branch'] and not injecting through dependency injection?

[michalsisak]

Hello, I wonder why you mention in your docs a way how to inject Branch through window object:
const Branch = window['Branch'];

and not the regular way by initializing it in constructor like:

export class UserService {
  constructor(
    private branch: BranchIo,
 ) {}

Is there any difference or drawback between those two methods?

Stack involved: Angular, Ionic 3, Capacitor ( I know there is a capacitor version of this plugin where the branch is only imported)