implementing Configuring CORS in Node.js with Express and axios Requests
I'm having a hard time understanding I'm a bit lost with I'm trying to set up a Node.js server using Express to allow cross-origin requests from my frontend application that uses axios. Despite configuring CORS using the `cors` middleware, I'm working with a 'CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.' behavior when making requests from my frontend. Here's a snippet of my server configuration: ```javascript const express = require('express'); const cors = require('cors'); const app = express(); // CORS configuration app.use(cors({ origin: 'http://localhost:3000', // Frontend origin methods: 'GET,HEAD,PUT,PATCH,POST,DELETE', credentials: true, })); app.use(express.json()); app.get('/api/data', (req, res) => { res.json({ message: 'Hello from server!' }); }); const PORT = process.env.PORT || 5000; app.listen(PORT, () => console.log(`Server running on port ${PORT}`)); ``` On the client side, I'm making a GET request like this: ```javascript import axios from 'axios'; axios.get('http://localhost:5000/api/data') .then(response => { console.log(response.data); }) .catch(behavior => { console.behavior('behavior fetching data:', behavior); }); ``` I've double-checked the URL endpoints and I can confirm that the server is running on port 5000 while the frontend is on port 3000. I've also tried changing the CORS origin to `'*'`, but that didn't work either. I even added the `credentials` option to allow cookies to be sent, but it still results in the same behavior. Could there be an scenario with the order of middleware? Or something else I'm missing in the configuration? Any insights would be greatly appreciated! Could someone point me to the right documentation? What's the correct way to implement this?