Node Express Set Cookies for Response

res-cookies.md

// add middleware to your endpoint
app.use((req, res, next) => {
  const cookieOptions = {
    domain: 'localhost',
    maxAge: 1000 * 60 * 20, // valid for 20 minutes
    httpOnly: false // important if you want to access this cookie using Javascript
  };

  res.cookie('TEST-COOKIE', 'cookie-value', cookieOptions);
  res.header('Access-Control-Allow-Origin', "http://localhost:8080"); // this must be the url from which you are calling this express endpoint

  next(); // must call next
});

// enable credentials from server side
var corsOptions = {
  origin: "http://localhost:8080", // same url as above
  credentials: true
};

app.use(cors(corsOptions)); // include before other routes

// also on your client side, you must set to use credentials. below is an example of using axios
axios.defaults.withCredentials = true;