[Passportjs][Angular5] No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access

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I am trying to integrate Nodejs backend api with Angular. I have implemented passpor-google, passport-github, passport-twitter strategy on the backend application.

My backend App url is http://localhost:3000 My Frontend App url is http://localhost:4200

Passport Routes
authRouter.get('/github', passport.authenticate('github'));
  passport.authenticate('github', {
    failureRedirect: 'http://localhost:4200/login',

When i send request from the frontend app it gives me CORS error

githubAuth(): Observable<LoginRsp> {
    return this.httpClient.get<LoginRsp>(

I have already added CORS on my Nodejs project. How can I resolve this issue please help me

use cors module cors or else use express cors middleware express cors

app.use(cors()); after this any other routes

const users = require('./routes/users');

or try moving cors middleware to top

[Passportjs][Angular5] No 'Access-Control-Allow , [Passportjs][Angular5] No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. angular 7� Passport is authentication middleware for Node.js.Extremely flexible and modular, Passport can be unobtrusively dropped in to any Express-based web application.A comprehensive set of strategies support authentication using a username and password, Facebook, Twitter, and more.

You could do it like in the image below

[Passportjs][Angular5] No 'Access-Control-Allow-Origin - html, Origin 'null' is therefore not allowed access - node.js. [Passportjs][Angular5] No 'Access-Control-Allow-Origin' header is present on the requested resource. It uses PassportJs for user authentication and is a basic example of server side authorization. It demonstrates how to make API calls accessible only to authenticated users, or only to users with admin role.

In AuthService.ts just use window.location.href='{environment.api_url}/auth/github'

Passport.js, Passport.js provides a simple authentication middleware that you can use with Node.js. Learn how to use it to easily add authentication to your Angular app. return res.status(400).json({"statusCode" : 400, "message" : "not� I'm using the passportjs Facebook module, Express, and Angular. I believe I have passport implemented correctly, but don't know 1) how I should be checking if a user is logged in, and 2) best practice for showing views based on the user state using Angular & Express.

You can simply write in your html template

<a href="http://localhost:3000/login/google">Google</a>

and on the backend you just need to have this

app.get('/login/google',  passport.authenticate('google', { scope: ['profile','email']}) );

[Passportjs][Angular5] No 'Access-Control-Allo, Dummy angular5, nestjs, typeorm stack (with material desing and flex-layout) - Gotyped all the way jwt angular mongodb material-design angular-material flex-layout typeorm passportjs express-js angular-material2 typedi passport-facebook nestjs angular5 angular-material5

How To Build Authentication in Angular Using Node and Passport , Update History: 31 May 2018 - Updated to Angular 5.2.11 and to the new HttpClient; 23 May 2018 - For an updated version built with Angular 6 check out Angular 6 - JWT Authentication Example & Tutorial.

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  • app.use(cors());
  • you might be using middleware at wrong scope ie make sure you use it before calling to any routes