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

app.post is as the name implies, for POST requests. OPTIONS request won't get routed to that method.

You need to write a handler specific for options like so,

app.options("*",function(req,res,next){
  res.header("Access-Control-Allow-Origin", req.get("Origin")||"*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
   //other headers here
    res.status(200).end();
});