Answers for "how to add a origin in cors in nodejs"

allow cross origin node

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

add access-control-allow-origin in node js

// Install cors package: npm install cors
const express = require("express");
const app = express();
const cors = require('cors');
app.use(cors());
// your http request should work after this