CORS Isn't Blocking You — Your Browser Is. Here's What's Actually Happening
Most developers treat CORS errors as a server configuration mystery. They're not. Your server responded fine — your browser intercepted the response. This post covers the CSRF attack CORS was built to prevent, how origin is actually defined, why Postman never sees CORS errors, how preflight requests work, and what every response header actually means.
CORSHTTPBrowser Security
