How do I get an instance of Angular router without injecting it?

Usually I'd go like this in my component.

import { Router } from "@angular/router";

@Component({ ... })
export class CompyTheComponent {
  constructor(private router: Router) { 
    console.log(router.url);
  }
}

What if I want to obtain a reference of it without injecting it? I've tried to create it but died on all the parameters I couldn't figure out. Ans since it's not the usual (nor recommended) way to approach it, there's not much googlearch on it.

let routy : Router = new Router(...);

Make a file called injector.ts with the following code:

import { Injector } from "@angular/core";

let appInjectorRef: Injector;

export function appInjector (injector?: Injector): Injector {
    if (!injector) {
        return appInjectorRef;
    }
    appInjectorRef = injector;
    return appInjectorRef;
}

Then in your main.ts:

bootstrap([...]).then((appRef: { injector: Injector }) => appInjector(appRef.injector))
  .catch((err: Error) => console.error(err));

Then you can use it as:

const router: Router = appInjector().get(Router);

In any case, I'd recommend dependency injection over this.