Example of canActiveRoutes.js in protecting routes using Firebase. See https://leightley.com/angular-2-and-firebase-authentication-route-guard/

canActiveRoutes.js

import { ModuleWithProviders } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

import { AppComponent } from './app.component';
import { AuthGuard } from "./services/authGuard.service";

import { LoginComponent } from "./views/login/login.component";
import { SignupComponent } from './views/signup/signup.component';
import { DashboardComponent } from "./views/dashboard/dashboard.component";

export const router: Routes = [
  { path: '', redirectTo: 'dashboard', pathMatch: 'full' },
  { path: 'login', component: LoginComponent },
  { path: 'signup', component: SignupComponent },
  { path: 'dashboard', component: DashboardComponent, canActivate: [AuthGuard] },
]

export const AppRoutes: ModuleWithProviders = RouterModule.forRoot(router);