<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h2>CORS error fixed and set headers in index file</h2> </div> </div>

import cors from "cors"; app.use(function(req, res, next) { res.setHeader("Access-Control-Allow-Origin", "*"); res.setHeader("Access-Control-Allow-Credentials", 1); res.setHeader( "Access-Control-Allow-Methods", "GET,HEAD,OPTIONS,POST,PUT,DELETE" ); res.setHeader( "Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept,authtoken" ); next(); }); app.use(cors());