Re: Fwd: XBL2: First Thoughts and Use Cases

On Thu, Dec 16, 2010 at 10:40 AM, Boris Zbarsky <> wrote:
> On 12/15/10 11:29 AM, Dimitri Glazkov wrote:
>> That seems like an implementation detail. Metadata can be shared and
>> cloned as needed, just like styles in CSS.
> Sort of.  It would need to be cloned as soon as the shadow tree is mutated,
> right?  That seems like very fragile behavior from a web author point of
> view, where it's easy to deoptimize without realizing it.

At least we can produce simple advice on how to definitely avoid
deoptimizing - stick with the declarative syntax and don't mutate the

With luck, enough use-cases will be solveable with the declarative
syntax that this will be an acceptable restriction.


Received on Thursday, 16 December 2010 19:53:44 UTC