What is CORS, and why is it important in full-stack development?

What is CORS, and why is it important in full-stack development?

Blog Article

CORS (Cross-Origin Resource Sharing) is a security feature that allows or restricts web pages from making requests to a different domain than the one that served the web page. It is enforced by browsers to prevent cross-site request forgery (CSRF) attacks.

In full-stack development, CORS is important when the frontend and backend are hosted on different domains. For example, a React frontend running on http://localhost:3000 might need to make requests to a Django backend running on http://localhost:8000. Without proper CORS configuration, the browser will block these requests.

To enable CORS, backend frameworks like Django and Flask provide middleware or extensions. For example, Django REST Framework can use the django-cors-headers package to allow requests from specific origins.