Re: Array property of custom object

On Tuesday, May 3, 2016 at 8:05:54 PM UTC+3, Boris Zbarsky wrote:
> On 5/3/16 12:45 PM, Mihai Dobrescu wrote:
> > Isn't there a generic trap for that in order to know the current item accessed?
> 
> Proxies have getOwnPropertyDescriptor, yes.  But to even get to that 
> point you have to have some other bits in place if you're doing for-in 
> or for-of.  Again, a proxy can do all the relevant bits.
> 
> -Boris

Is there some example or guidance on how to do it?