Hello guys, Can someine help? I have a MERN application working perfectly locally. But I decided to deploy both the frontend (React vite app) and backend separately, on vercel. I am now facing issues due to the CORS (Cross-Origin-Resource-Sharing). When running testing the app, on the browser, I h…

As you can see, the CORS is still missing for the required website where you are trying to make the HTTP request. I would recommend checking the source code thoroughly, deploying without cache and make sure the URL is being set properly in build time.

CORS from issue from MERN app (deployed in vercel)

Help

swarnava (Swarnava Sengupta) Split this topic January 19, 2025, 5:47am 5

A post was split to a new topic: Issue with setup Cookie from MERN app (deployed in Vercel)

Topic		Replies	Views
Headers not persisted well Help express	4	62	April 8, 2025
CORS Issue when deploying on Vercel Help express	9	371	January 3, 2025
CORS: No ‘Access-Control-Allow-Origin’ header in Express app (Node.js 24) Help express , nodejs , node	6	76	January 13, 2026
CORS Issue on Node.js Express App with Vercel Help express , react	4	239	September 30, 2024
Flask + Server Functions - CORS Help python	2	129	March 2, 2025

CORS from issue from MERN app (deployed in vercel)

Related topics