Auth Guard in Angular 2+

import { Injectable } from '@angular/core';

import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';

import { Observable, of as observableOf } from 'rxjs';

import { AuthServicesService } from './auth-services.service';

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

import { HttpClient, HttpHeaders } from "@angular/common/http";

import {map} from 'rxjs/operators';

import { AllServiceService } from "./all-services/all-service.service";

@Injectable({

  providedIn: 'root'

})

export class AuthGuard implements CanActivate {

  

  constructor(

    private router:Router,

    private auth: AuthServicesService,

    private myRoute: Router,

    private http:HttpClient,

    private manage:AllServiceService,

    ){}

  canActivate(

    next: ActivatedRouteSnapshot,

    state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean {

      

  if(this.auth.isLoggednIn()){

    return true;

  }

  else {

    return false;

  }

}

}