[whatwg] Quirks Mode Standard

[Boris Zbarsky]

On 2/10/12 11:23 AM, Aryeh Gregor wrote:
> On Fri, Feb 10, 2012 at 10:37 AM, Boris Zbarsky<bzbarsky at mit.edu>  wrote:
>> I agree that having the list for lengths reduces the scope of the problem
>> somewhat.  But the color quirk means that any shorthand that includes colors
>> will run into ambiguity issues if any keywords for any subproperty only use
>> letters in the range a-f.  I _think_ we can't hit that case now, but going
>> forward that will either place a restriction on keyword values or we'll need
>> to define how to resolve the ambiguity somehow.
>>
>> Even for lengths, if we ever add any new subproperties to border, say, that
>> happen to take numbers we would run into trouble.  I'd rather not
>> overconstrain future development of CSS by how we define quirks behavior.
>
> Why not just say that these quirks only apply to existing syntaxes,
> not new ones?

Simon's proposal does that, but it's not good enough to avoid all the 
problems.  For example, border-bottom-width is in the list of properties 
that has the quirk apply to it, as is border-bottom.  If we add a 
border-bottom-count property for some sort of multiple border setup and 
allow setting it via border-bottom, then you suddenly have a parsing 
ambiguity for border-bottom, right?

-Boris