How to set Cross-Origin-Opener-Policy when using Reactjs

Question

How do I resolve the "Cross-Origin-Opener-Policy policy will prevent the window.closed call" error in my React app? This error appears to be related to the Cross-Origin-Opener-Policy (COOP) policy set on the server. How can I handle this error and ensure that my React app runs properly while respecting the COOP policy restrictions? enter image description here

So far I've searched and learned that I need to set Cross-Origin-Opener-Policy: unsafe-none Cross-Origin-Opener-Policy: same-origin-allow-popups Cross-Origin-Opener-Policy: same-origin But I don't know where and how to set it.

Answer 1

$ npm install cors

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

app.use(cors())

app.get('/products/:id', function (req, res, next) {
res.json({msg: 'This is CORS-enabled for all origins!'})
})

app.listen(80, function () {
console.log('CORS-enabled web server listening on port 80')
})

For more details please see: https://www.npmjs.com/package/cors

Note: CORS must be enabled on the server running the API. You cannot enable this feature in client code. If the API supports CORS, the browser will initiate a request