On Sep 12, 2013, at 11:43 AM, Boris Zbarsky <bzbar...@mit.edu> wrote:
> On 9/12/13 2:36 PM, Gavin Barraclough wrote: >> Hmmm, interesting. I was thinking that in the case that a shadowing >> property was put to the named property object itself > > Can't be done. Looking at the ES5 [[Put]], ownDesc is a data descriptor > here, so we land in step 3b, which calls [[DefineOwnProperty]], which is > defined at > http://dev.w3.org/2006/webapi/WebIDL/#named-properties-object-defineownpropertyand > throws if "Throw" and silently does nothing otherwise. ES6 is similar. Ah, good point. Firefox, Safari, Chrome all currently all allow this, but seems reasonable to prohibit. cheers, G. >> then deleted > > Also can't be done. See > http://dev.w3.org/2006/webapi/WebIDL/#named-properties-object-delete > >> Many thanks, > > No problem! > > -Boris
