[whatwg] should we add beforeload/afterload events to the web platform?

Boris Zbarsky bzbarsky at MIT.EDU
Tue Jan 17 16:52:16 PST 2012

On 1/17/12 7:37 PM, James Robinson wrote:
> The way that these sorts of schemes work is that the server knows that a
> set of resources are needed in addition to the main resource and it
> starts sending them down before the client has received/parsed the main
> resource.  The server serving foo.html can have a pretty good idea about
> whether foo.html contains the string "<script src=foo.js>" so there
> isn't any real reason for it to not serve foo.js at the same time
> assuming that the underlying protocol can handle such a thing.  In
> situations with high RTTs and reasonable bandwidth (like common mobile
> networks) this can be a big win.
> I bring this up to make sure that we aren't making promises about
> resource loads that we can't keep.

Yeah, makes sense.  Such promises are precisely what I'd like to avoid, yes.


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