How do CORS work?
CORS is enforced by the browser through HTTP headers that tell which origins are allowed to access the resource server. When this cross-origin request is made, the browser sends an ‘OPTION’ preflight request to the server to check if the request is safe or not. If the server response does not include the appropriate CORS headers, the browser blocks the request.
How to Fix CORS Errors in Next.js and Vercel?
Cross-Origin Resource Sharing (CORS) is a security feature that restricts web apps from making requests to a different domain than the one that served the web page to it. This is needed for security, although sometimes it can block legitimate requests, especially when working with APIs. In this article, we will learn fixing the CORS errors in the Next.js application deployed on Vercel.