Angular

get-current-navigation.ts

import { Component, OnInit } from '@angular/core';
import { Navigation, Router } from '@angular/router';
import { AuthService } from '../../services/auth/auth.service';

@Component({
  selector: 'app-sign-in',
  templateUrl: './sign-in.component.html',
  styleUrls: ['./sign-in.component.scss'],
})
export class SignInComponent implements OnInit {

  private _currentNavigation: Navigation | null;

  public url: string | null = '/';
  public auth: boolean = false;
  public error: string = '';

  constructor(private router: Router, private authService: AuthService) {
    this._currentNavigation = router.getCurrentNavigation();
  }

  ngOnInit(): void {
    console.log(this._currentNavigation);
    const currentRedirect: string = this._currentNavigation?.extras.state?.["url"];

    this.url = currentRedirect || '/';
    this.auth = this.authService.isLoggedIn();
  }

  toggleAuth(): void {
    this.error = '';
    this.authService.toggleAuth();
    this.auth = this.authService.isLoggedIn();
  }

  goToApplication(): void {
    if ( this.authService.isLoggedIn() ) {
      this.router.navigate([this.url], this._currentNavigation?.extras)
    } else {
      this.error = 'Ошибка авторизации!';
      this.auth = this.authService.isLoggedIn();
    }
  }
}

routing.ts

// navigation
this.router.navigate(['/']);