On 11/1/2013 4:59 PM, Brandon Benvie wrote:
> On 11/1/2013 4:31 PM, Brandon Benvie wrote:
>> In the spec for Object.prototype.toString:
>>
>> 'If tag is any of "Arguments", "Array", "Boolean", "Date", "Error",
>> "Function", "Number", "RegExp", or "String" and SameValue(tag,
>> builtinTag) is false, then let tag be the string value "~"
>> concatenated with the current value of tag.'
>
> An interesting consequence of this is that a Proxy for any of these
> will default to being "~" + target class. So
> `Object.prototype.toString.call(new Proxy([], {}))` is "[object
> ~Array]". But it seems the shipped has already sailed on Proxies being
> conspicuously not interchangeable with their targets in many cases...
Actually that's incorrect. Proxies explicitly will return "Proxy" for
their tag. Same problem though.
domenic at domenicdenicola.com (2013-11-12T18:54:42.490Z)
Actually that's incorrect. Proxies explicitly will return "Proxy" for
their tag. Same problem though.
On 11/1/2013 4:59 PM, Brandon Benvie wrote: > On 11/1/2013 4:31 PM, Brandon Benvie wrote: >> In the spec for Object.prototype.toString: >> >> 'If tag is any of "Arguments", "Array", "Boolean", "Date", "Error", >> "Function", "Number", "RegExp", or "String" and SameValue(tag, >> builtinTag) is false, then let tag be the string value "~" >> concatenated with the current value of tag.' > > An interesting consequence of this is that a Proxy for any of these > will default to being "~" + target class. So > `Object.prototype.toString.call(new Proxy([], {}))` is "[object > ~Array]". But it seems the shipped has already sailed on Proxies being > conspicuously not interchangeable with their targets in many cases... Actually that's incorrect. Proxies explicitly will return "Proxy" for their tag. Same problem though.