Frozen Date objects?

Jonas Sicking jonas at sicking.cc
Wed Jul 17 16:59:58 PDT 2013


On Wed, Jul 17, 2013 at 7:55 PM, Brandon Benvie <bbenvie at mozilla.com> wrote:
> On 7/17/2013 4:54 PM, Norbert Lindenberg wrote:
>>
>> On Jul 17, 2013, at 16:51 , Brandon Benvie <bbenvie at mozilla.com> wrote:
>>
>>> On 7/17/2013 4:42 PM, Brandon Benvie wrote:
>>>>
>>>> On 7/17/2013 4:36 PM, Jonas Sicking wrote:
>>>>>
>>>>> Is this simply a SpiderMonkey bug? Do we expect JS code to be able to
>>>>> handle Date objects representing timezones other than the user's
>>>>> current timezone?
>>>>
>>>> What happens if the timezone changes between the creation of two Date
>>>> objects, such as for daylight savings or the user changes their system
>>>> timezone?
>>>
>>> Having just tested this, it is possible in SM to get two Dates that
>>> report different values from getTimezoneOffset.
>>
>> How?
>>
>> Norbert
>>
>
> Create a Date object, change the system timezone, create a second Date
> object. They reflect the timezone at time of Date object creation, not a
> static one.

That doesn't reflect what I'm seeing. I see the timezone of all Date
objects changing whenever the timezone is update. Existing instances
are also changed.

/ Jonas


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