Understanding Cross-Origin Resource Sharing (CORS) for Web Developers

CORS is a security mechanism implemented by web browsers that allows or restricts requests for web page resources from another domain outside the domain from which the first resource was served.

The core of CORS allows controlled access to resources from different origins (domains). and prevents unauthorized access that can lead to information security - vulnerabilities such as cross-site request forgery (CSRF) or sensitive data flow.

When a web page requests a resource for another domain, the browser by default …

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