Allowing CORS for Express, React
In your Express server
const cors = require('cors')
const app = express()
app.use(cors({ origin: 'process.env.FRONTEND_URL' }))
In your React server, using ‘axios’
import axios from 'axios'
const instance = axios.create({
baseURL: 'http://localhost:5000',
timeout: 1000,
})
instance.post(...)