Frozen Date objects?
Allen Wirfs-Brock
allen at wirfs-brock.com
Mon Jul 22 07:42:00 PDT 2013
On Jul 21, 2013, at 11:05 PM, Jonas Sicking wrote:
>>
>
> I still don't feel like I have a clear answer to two fundamental
> questions when designing DOM specs:
>
> 1. Is it ever appropriate to return Date objects from methods in the
> DOM? If so, in what circumstances. Two cases where we are currently
> considering using Date objects are:
...
> 2. Is it ever appropriate to return a Date object from a "readonly"
> property.
How about :
3. Is it ever appropriate for a DOM API to accept and retain a reference to a Date object?
The timevalue of a Date object that was passed to a DOM API can be modified by the original client after the DOM call returns. If the DOM has retained and uses a reference to the Date object it will see the modified timevalue rather than the originally pass timevalue.
Allen
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