> On Jun 8, 2017, at 11:32 AM, Tab Atkins Jr. <[email protected]> wrote:
>
> Naively, this requires a Proxy, so we can intercept uses of the []
> syntax. However, we don't need all the rest of the Proxy
> functionality, just this one intercept - a setter function, just for
> `obj[foo]` rather than `obj.foo`. Further, Typed Arrays already have
> *precisely* the functionality I'd like to use - they intercept setting
> using [], and convert it into the appropriate type of number. AWB
> also proposed adding exactly this hook in the past (I think it was
> called "Array reformation" or something?).
that proposal page can be access here:
https://web.archive.org/web/20160425220917/http://wiki.ecmascript.org/doku.php?id=strawman:object_model_reformation
<https://web.archive.org/web/20160425220917/http://wiki.ecmascript.org/doku.php?id=strawman:object_model_reformation>
the basic idea was that distinct internal methods (Proxy traps) are used for .
and [] property accesses and that the default behavior for [ ] accesses is to
look for specific symbol-keyed methods and if found defer the access logic to
the method. If not found the behavior is the same as for . accesses.
Allen
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