May the defineProperty method of a proxy handler throw a TypeError?
dflanagan at mozilla.com
Fri Jun 17 15:47:57 PDT 2011
On 6/17/11 3:05 PM, David Bruant wrote:
> What about adding a "throw" argument to the defineProperty trap (and any
> trap for which the equivalent internal method has a "throw" argument) ?
> The engine would set the boolean value correctly depending on strict
> mode or any relevant parameter. Trap writers can adapt their behavior
> based on this boolean.
defines appropriate Reject behavior (return false or throw) for the
[[Put]] and [[Delete]] operations based on the return value of the put()
and delete() traps. [[DefineOwnProperty]] is the only one that does not
Given that the fixed properties proposal is adding a return value to
defineProperty, perhaps returning false would be a suitable way to
reject a property definition.
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