![]() Q: In IE, I'm getting an Access Denied errorĪ: This is error occurs when IE attempts a CORS request. Q: XDomain works for a few requests and then it stops.Ī: Most likely, the slave iframe was removed - this is often due to libraries like Turbolinks Note: In newer browsers xhook.addWithCredentials has no effect as they already support withCredentials. addWithCredentials = false //fix jquery cors jQuery. So, if you are using any of these libraries which implement their own CORS workarounds, you can do theįollowing to manually disable defining withCredentials and manually reenable CORS on jQuery: Other libraries like: MixPanel, FB SDK, Intercom as they will incorrectly attempt CORS on domains The most notable library that does this is jQuery, so XHook purposefully defines withCredentials to trick jQuery into thinking the browser supportsĬORS, thereby allowing XDomain to function seamlessly in IE. To determine if the browser supports CORS. Many use the presence of 'withCredentials' in new XMLHttpRequest() Note however, one purposefulĭifference affects some libraries under IE. If there is a difference, create an issue. Q: XDomain is interfering with another library!Ī: XDomain attempts to perfectly implement XMLHttpRequest2 Google also uses iframes as postMessage proxies instead of CORS in its Google API JS SDK: Not everyone is able to modify HTTP headers on the server, but most can upload a proxy.html file. Preflight OPTIONS request preceding various types of requests. On a RESTful JSON API server, CORS will generate superfluous traffic by sending a The CORS spec is not as simple as it seems, XDomain allows you to use plain XHR instead. Requests may only use the Content-Type header.Requests only emit progress, timeout and error.Requests must use the same protocol as the page http -> http. ![]() XDomainRequest also has many restrictions: IE uses a different API (XDomainRequest) for CORS, XDomain normalizes this silliness. If you need a CORS Polyfill and you're here because of IE, give this XHook CORS polyfill a try, however, be mindful of the restrictions listed below. The missing JSON and/or postMessage globals and will exit. ![]() If you don't do this, XDomain will warn you about Use the HTML5 document type to prevent your pageįrom going into quirks mode. XHR interception is done seamlessly via XHook.
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