First of all, thanks @jresig because that's just way too elegant. I was anticipating something far more complex.
A couple of questions: If http://cdn/jQuery.js fails, we want the local-domain jQuery.js to load next, BEFORE the any other subsequent script which is likely a $ (function(){}) or a call for plugin, both of which have a jQuery predicate. So I don't sense that Phil's ...('head')[0].appendChild (script) would work reliably. Am I wrong about that? Does this really work as you expect, Phil? I would expect a prependChild(), no? Second, Dave raises another crux of the matter: we need to bail to the failover ASAP, ideally within a second or two. It's almost as if we need the CDNs to also provide a sub-packet-sized package we could request, wrapped inside a very short timeout to bail to the failover. **--** Steve On Oct 9, 9:10 am, Dave Methvin <[email protected]> wrote: > > I took this great idea and went ahead implementing it on a few sites I > > maintain using different syntax. > > It's more than a syntax change; it's entirely different semantics. > Your version fetches a copy of jQuery asynchronously. If there is > a .ready() handler below that block of code, jQuery may not be loaded > by the time it is reached and you'll get errors. By using > document.write and a script tag, you can be guaranteed that the > browser won't proceed to run any code below it until it either loads > the script or gets an error back from the request (like a 404 or a > timeout). > > I'd think the timeout situation is the most likely outcome when > Google's CDN is down, which means the user will see a blank screen for > 30 to 60 seconds before it even reaches the document.write anyway. So > it seems like you'd need to load the Google CDN version asynchronously > to prevent that. But that raises the question of what to show the user > while it's trying to find a reachable version of jQuery... --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jQuery Development" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/jquery-dev?hl=en -~----------~----~----~----~------~----~------~--~---
