Re: xframe or iframe type='cross-domain'

[Boris Zbarsky]

On 2/9/12 12:43 PM, John J Barton wrote:
The drawback is that your fallback behavior in UAs without support for the
new feature is quite different.  Is that a problem?  Developer feedback
definitely needed there.

Extending the API on iframe would make fallback easy even though it
lacks elegance:
   if (iframe.port) {
      // modern browser
   } else {
     // we still deal with contentWindow carefully for old timers
   }


The fallback issue I was talking about is that if you mint a new element 
called <xframe> then it wouldn't even load pages in an old browser.

-Boris