[[Invoke]] and implicit method calls
bbenvie at mozilla.com
Fri Sep 20 16:27:30 PDT 2013
On 9/20/2013 12:19 PM, Jason Orendorff wrote:
> what's the justification for .hasOwn()?
> a) allows more direct interception of Object.prototype.hasOwnProperty()
> b) potentially less allocations each time someone calls .hasOwnProperty().
> I think .hasOwn() should be removed.
Actually, taking the precedent of removing "getPropertyDescriptor", it's
"has" that would be removed. The implementation of [[Has]] can easily
walk the [[GetPrototype]] chain calling "hasOwn" on each until true or
[[GetPrototype]] returns null. In fact, some agreed for a short time to
*remove* the "has" trap specifically for this reason, but it was added
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