CORS

Give me a reason: CORS headers CORS (Cross-Origin Resource Sharing) is a fundamental web security feature that acts like a gatekeeper, controlling how web pages can request resources from different domains. For example, when working in an Observable notebook and trying to fetch data directly from an external API (as I did), you are making a cross-origin request because your notebook is running on observablehq.com while trying to access data from another domain. Your browser will reject this “cross-origin” action unless the server explicitly allows it! ...