How to Enable CORS from Nodejs server

Question

I am using react to send data to my API. Every POST request I make gives me an OPTIONS request, and I need to fix this. I think I might need to do some preflight structure but a

Answer 1

If you are using Express.js just install cors:

npm install cors

Then you add it like this:

var express = require('express')
var cors = require('cors')
var app = express()

app.use(cors())