CORS and Same Origin Policy - what is it and how does it work?

In the article 'CS Visualized: CORS' by Lydia Hallie, the concept of CORS, or Cross-Origin Resource Sharing, is presented in an accessible way. CORS is a security mechanism implemented by browsers to prevent unauthorized access to resources from different origins. The article explains how CORS works, why it was created, and the fundamental elements involved in this process. It includes examples that illustrate the implications of CORS on communication between the browser and the server. With helpful visualizations, the author effectively clarifies complex issues related to CORS, making it easier for developers to understand how to manage resource access within their applications.