Re: [WebIDL] T[] migration

On Fri, 18 Dec 2015 18:04:27 +0100, Olli Pettay <> wrote:

> On 12/18/2015 06:20 PM, Domenic Denicola wrote:
>> From: Simon Pieters []
>>> Note that it requires liveness. Does that work for a frozen array?
>> Frozen array instances are frozen and cannot change. However, you can  
>> have the property that returns them start returning a new frozen array.  
>> The spec needs to track when these new instances are created.
> Changing the array object wouldn't be backwards compatible.
> (The attribute used to be DOMStringList)
>>> Maybe this particular API should be a method instead that returns a  
>>> sequence<DOMString>?
> Also not backwards compatible.
> But I'd assume the first option (changing the array) would be less  
> backwards incompatible, so I'd prefer that one.

OK, but... Document#styleSheetSets is not widely implemented, and appears  
to not be widely used. On github I see 80 code matches in javascript,  
where most are just listing stuff, some are browser sniffing, and some  
might be actual usage (maybe with a fallback for other browsers?).  
Although it has been implemented in Gecko for a long time, I think it is  
possible to make incompatible changes (or maybe drop altogether).

Simon Pieters
Opera Software

Received on Monday, 21 December 2015 08:56:31 UTC