Is CORS a client-side or server-side issue?
Server-side. The server must include the correct CORS headers. The browser enforces CORS by checking the headers. You cannot fix CORS from the client side (the server must allow your origin).
Verify This Answer
Cross-check this information using these trusted sources:
More FAQs in CORS Interview Questions
Cross-Origin Resource Sharing. A browser security mechanism that allows servers to opt-in to cross-origin requests by including Access-Control-Allow-Origin and related headers.
An OPTIONS request sent before non-simple requests (PUT, DELETE, PATCH, custom headers, application/json). The browser checks if the server allows the method, headers, and origin before sending the actual request.
Configure the server: Access-Control-Allow-Origin (your origin), Access-Control-Allow-Methods, Access-Control-Allow-Headers. Handle OPTIONS preflight with 204. Use the cors middleware in Express. Use a proxy in development.
Still have questions?
Browse all our FAQs or reach out to our support team