Tom Van Cutsem wrote:
No really, it was a way to expose a test of the [[Class]] internal
property. That test wasn't dependent upon the [[Prototype]] chain.
I think what Domenic was saying is that Array.isArray used such a test
*because* instanceof Array didn't work reliably cross-realms. I too
vaguely recollect that reliable cross-realm "instanceof Array" testing
was a primary motivation for Array.isArray.
Yes, that was Crock's stated motivation as I recall. Here's a 2003-era
post from Doug:
https://groups.google.com/forum/#!msg/comp.lang.javascript/XTWYCOwC96I/70rNoQ3L-xoJ
/be
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