I’m using the following JavaScript function to detect whether a browser has support for Cross-Origin Resource Sharing (CORS) XHR.
function browserSupportsCors() { if ("withCredentials" in new XMLHttpRequest()) return true; else if (window.XDomainRequest) return true; else return false; }
The XDomainRequest
object is specific to IE 8 and IE9, other browsers, including IE 10, extend the existing XMLHttpRequest
.
I use this piece of code in the Json2Ldap directory Ajax demo which I posted the other day.
jQuery still has no complete and robust plugin for CORS support. I hope this situation will change soon as browser support for CORS has passed 80%.
PS July 2012: Update of the CORS detection code to handle IE 9 better.