CORS

Cross-Origin Resource Sharing (CORS) is a security feature implemented by browsers to protect users from accessing resources on different domains. In backend systems, CORS is handled by allowing or blocking requests based on the rules defined in server configurations. The server must include the ‘Access-Control-Allow-Origin’ header in its response to inform the browser about which domains are allowed to access its resources. Additionally, other headers like ‘Access-Control-Allow-Methods’ and ‘Access-Control-Allow-Headers’ can be used to specify allowed methods and headers for CORS. Proper handling of CORS is important to ensure the security and integrity of the backend system.