On Thu, Dec 10, 2009 at 6:42 PM, Maciej Stachowiak <[email protected]> wrote:
> > On Dec 10, 2009, at 5:09 PM, Mike Samuel wrote: > > 2009/12/10 Mark S. Miller <[email protected]>: > > By the current taxonomy, Object.prototype.hasOwnProperty(myProxy) is > > meta-level and always returns false on a trapping proxy, revealing that it > > does not actually have any own properties. > > > Hmm. So a proxy of an object cannot be used as a drop-in replacement > for that object with any code that uses own property loops like > for (var k in o) if (Object.hasOwnProperty.call(o, k)) ... > ? > That seems to make it less useful. > > > It would also make this mechanism unsuitable for building emulations of DOM > objects that have catchall properties in pure ECMAScript. Is that a design > goal for this mechanism? > Hi Maciej, I agree that it is a problem. Tom & I are currently discussing what to do about it. But I don't understand your description above. What does "DOM objects that have catchall properties in pure ECMAScript" mean? Thanks. -- Cheers, --MarkM
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