CORS_Example.js

// CORS middleware function (this will allow any host to be able to send requests)

function allowCors(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
}



// This is how you tie it into your app -
// NOTE: This opens up every single route - this is merely an example

const express = require('express');
const app = express();

// other stuff here

// add CORS middleware
///// SET UP CORS //////
app.use(allowCors); ////
////////////////////////

// more stuff here

let listenOn = 5000;
app.listen(listenOn, () => { 
    console.log(`App started on port ${listenOn}`) 
});