Access-Control-Allow-Origin Policy

[hrishikesh]

No duplicates please:

Access to XMLHttpRequest at 'https://xyz.herokuapp.com/products' from origin 'https://abc.netlify.app' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource

I am building my first MERN web app and I have to submit on Monday (that is in 2 days) netlify site name : https://venerable-daffodil-ed3e93.netlify.app/ I am able to deploy my app but after deployment I cannot login, and the above is the error that I`m getting TECH STACK = NODE + EXPRESS + REACT + MONGODB my backend server.js looks like this const express = require('express'); const cors = require('cors'); const app = express(); const http = require('http'); require(`dotenv` ).config(); co…