Deadly CORS when http://localhost is the origin

Question

I am stuck with this CORS problem, even though I set the server (nginx/node.js) with the appropriate headers.

I can see in Chrome Network pane -> Response Headers:

Answer 1

Chrome will make requests with CORS from a localhost origin just fine. This isn't a problem with Chrome.

The reason you can't load http://stackoverflow.com is that the Access-Control-Allow-Origin headers weren't allowing your localhost origin.