2014-11-14 21:00 GMT+01:00 Allen Wirfs-Brock <al...@wirfs-brock.com>:
> On Nov 14, 2014, at 11:41 AM, Domenic Denicola wrote: > > > Yeah, more or less. A "realm-independent instanceof." This makes sense > also from the historical perspective that `Array.isArray` was meant to > provide a cross-realm alternative to `instanceof Array`. (I believe that > was the case; before my time.) > > 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.
_______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
