How to Fix CORS Errors in Your Frontend App Using a Proxy Server

📰 Dev.to · 0xDezman

Learn to fix CORS errors in your frontend app using a proxy server to enable cross-origin resource sharing

intermediate Published 27 Mar 2026

Action Steps

Set up a proxy server using a library like http-proxy-middleware to forward requests from your frontend app to your backend API
Configure the proxy server to handle CORS headers and enable cross-origin resource sharing
Test your frontend app to ensure that API calls are being made successfully through the proxy server
Use a tool like Postman to verify that the proxy server is correctly forwarding requests to your backend API
Implement error handling to catch and handle any errors that may occur when making requests through the proxy server

Who Needs to Know This

Frontend developers and backend developers working together on web applications will benefit from this tutorial, as it provides a solution to a common issue that arises when making API calls from the frontend

Key Insight

💡 Using a proxy server can help bypass CORS restrictions and enable cross-origin resource sharing in your frontend app