Answers for "cors preflight request nodejs express cors"

express js cors

var express = require('express')
var cors = require('cors')  //use this
var app = express()

app.use(cors()) //and this

app.get('/user/:id', function (req, res, next) {
  res.json({user: 'CORS enabled'})
})

app.listen(5000, function () {
  console.log('CORS-enabled web server listening on port 5000')
})

add express and cors to nodejs app

/*index.js*/                                                         
const express = require( 'express' );                                                             
const cors = require( 'cors' );
const app = express();                                                                                          const port = 3030;
//cors is enabled through out the entire app                                                                                  
app.use( cors() );
app.get( '/users', (request, response, next) => {                                                                                                                                                                                                                                                                            res.json( { info: 'cors is enabled' } )                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        });
app.listen( port, () => {                                                              
  console.log(`App is running on ${port}`)                                                      
  });