Add Access Control Origin Response Header - Microsoft Q&A
angularjs - how to resolve No 'Access-Control-Allow-Origin' header is present on the requested resource - Stack Overflow
visualforce - Getting No 'Access-Control-Allow-Origin' header is present on the requested resource on site with an actionFunction - Salesforce Stack Exchange
nginx - No 'Access-Control-Allow-Origin' header is present on the requested resource in Node.js - Stack Overflow
Complete Guide to Cross-Origin Resource Sharing (CORS) - KeyCDN Support