I'm having difficulty getting Respond's CDN/X-Domain Setup working.
I started off serving all assets from the CDN:
<link rel="stylesheet" href="http://cdn.example.com/css/main.css?2013012401">
<script src="http://cdn.example.com/js/modernizr-2.6.2.min.js?2013012401"></script>
<script src="http://cdn.example.com/js/respond.min.js?2013012401"></script>
In theory this should work, since all assets are being served from the same domain. However IE8 didn't receive Media Query support like it should. So I investigated Respond's CDN/X-Domain Setup and amended my <head> section to this:
<link rel="stylesheet" href="http://cdn.example.com/css/main.css?2013012401">
<script src="http://cdn.example.com/js/modernizr-2.6.2.min.js?2013012401"></script>
<script src="http://cdn.example.com/js/respond.min.js?2013012401"></script>
<link href="http://cdn.example.com/respond-proxy.html?2013012401" id="respond-proxy" rel="respond-proxy">
<link href="http://cdn.example.com/img/respond.proxy.gif?2013012401" id="respond-redirect" rel="respond-redirect">
<script src="http://cdn.example.com/js/respond.proxy.js?2013012401"></script>
When that also failed, I amended my <head> section to this:
<link rel="stylesheet" href="http://cdn.example.com/css/main.css?2013012401">
<script src="http://cdn.example.com/js/modernizr-2.6.2.min.js?2013012401"></script>
<script src="http://cdn.example.com/js/respond.min.js?2013012401"></script>
<link href="http://cdn.example.com/respond-proxy.html?2013012401" id="respond-proxy" rel="respond-proxy">
<link href="/img/respond.proxy.gif" id="respond-redirect" rel="respond-redirect">
<script src="/js/respond.proxy.js"></script>
I'm not sure what else I can try really to get this to work. It works fine in a local Dev environment that's not using the CDN, but in the Live environment this Respond.js CDN/X-Domain Setup is not working. Could it possibly be related to the cache-buster query string added to the CDN assets? Why is my original example not working when all assets are being served from the same domain?
This issue was caused by the respond-proxy.html file reference containing a query string (respond-proxy.html?2013012401). Removing the query string from this file causes the above implementation to work.
来源：https://stackoverflow.com/questions/14564079/respond-js-not-working-cross-domain