The server must respond with:
When a web page makes a cross-origin request, Chrome sends an OPTIONS request (also known as a preflight request) to the server to determine if the request is allowed. If the server responds with the correct headers, Chrome allows the request to proceed. cors chrome
| Myth | Reality | |-------|---------| | "CORS is a server-side problem only" | It’s enforced by Chrome, but fixing requires server changes. | | "Chrome blocks cross-origin requests entirely" | No, it blocks them if the server doesn’t allow them via headers. | | "Adding Access-Control-Allow-Origin: * is always safe" | Not for credentialed requests; also, * prevents cookie sending. | The server must respond with: When a web