46 CORS Explained in 8 Minutes (You’ll Never Get Errors Again!)
CORS (Cross-Origin Resource Sharing) is a security feature in web browsers that controls how resources on a web server can be requested from a different domain. It is designed to prevent unauthorized access to sensitive data.
How CORS Works:
Same-Origin Policy: By default, web browsers enforce a rule called the same-origin policy, which restricts JavaScript in one domain from accessing resources on another domain.
CORS Headers: To allow cross-origin requests, the server must send specific HTTP headers (like Access-Control-Allow-Origin) that grant permission to the requesting domain.
Preflight Requests: Some requests (e.g., those with custom headers or non-GET methods) trigger a "preflight" request using the HTTP OPTIONS method. The browser first asks the server if it allows the request before sending the actual request.
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