?> The major issue I have with the way the spec is written is that there is
no way to feature detect this capability. I'd like this behavior (which I
agree, is useful), to be more explicit so we can easily make use where
available.
I agree, the spec doesn't make it clear in its current wording how this
could be feature-tested. And (as you know, Nicholas), I'm a firm believer
that any new functionality *must* be feature-testable rather than
browser-inferences or UA sniffing. :)
However, the current IE implementation (with the additional `readyState`
property) does actually provide a feasible feature-test (in fact, I'm
working on a new revision of LABjs to take advantage of this functionality
for IE).
The feature-test for IE essentially looks for the presence of the
`readyState` property on a newly created script element, and then also
inspects its value, because in IE it always defaults to "uninitialized" as
its value. The reason for having to also test the value is because Opera has
had a present-but-non-functional `readyState` property on their script
elements since like 9.2, with a default value of "loaded".
If the spec considers adding an event system to this mechanism similar to or
compatible with IE's existing mechanism, I think this could be a valid
approach to feature-testing, assuming the browsers all agree to play nicely.
:)
--Kyle
