Add guard

src/app/guards/auth.guard.ts

@@ -0,0 +1,25 @@
+import { Injectable } from '@angular/core';
+import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, UrlTree, Router } from '@angular/router';
+import { Observable } from 'rxjs';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class AuthGuard implements CanActivate {
+  constructor(
+    private router:Router
+  ){}
+  
+  canActivate(
+    route: ActivatedRouteSnapshot,
+    state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
+    
+    if(window.location.pathname != '' && !localStorage.getItem('UserData')) {
+      this.router.navigate(['/']);
+      return false
+    } else {
+      return true
+    }
+  }
+  
+}