Re: Proposal: will-animate property

On Wed, Dec 4, 2013 at 5:15 PM, Robert O'Callahan <robert@ocallahan.org>wrote:

> On Thu, Dec 5, 2013 at 11:12 AM, Benoit Girard <bgirard@mozilla.com>wrote:
>
>>
>>  The problem with that approach is that when some browser adds
>>> new-property and extends will-animate syntax to support new-property, and
>>> an author writes "will-animate: transform, new-property", other browsers
>>> get no will-animate at all.
>>>
>>
>> Can we simply require all identifiers (except all, inherit, initial,
>> unset) to be parsed?
>>
>
> Yes, we proposed that. I'm talking about the problem with Ali's approach.
>

Could we just require the entire list to be parsed, and require
implementations to ignore any string outside of the specified set? Then
when a new-property is added to the spec, older browsers and browsers that
don't care about new-property can treat "will-animate: new-property,
transform" as just "will-animate: transform".