Jonas Sicking wrote:
On Wed, Sep 23, 2009 at 6:00 PM, Sean Hogan <shogu...@westnet.com.au> wrote:
Jonas Sicking wrote:
On Wed, Sep 23, 2009 at 4:51 AM, Lachlan Hunt <lachlan.h...@lachy.id.au>
wrote:
*Scoped Queries*
http://www.w3.org/Bugs/Public/show_bug.cgi?id=5860
This has been discussed extensively in the past. Basically, the idea is
that the selector would be evaluated in the scope of the element, in a
way
more compatible with how libraries like JQuery work. This slightly
different from the :scope pseudo-class proposal, see bug for details.
Note that what makes the ">strong, >em" selector (which apparently
some libraries support) hard to support spec-wise is that that is not
in fact valid CSS syntax. It's certainly possible to define behavior
for it, it's pretty clear to me how it's intended to work, but it
would mean specifying our own syntax.
It is clear how it is intended to work, but it is less powerful than a
:scope selector.
I suggest it is a low priority feature.
But a :scope selector by itself doesn't help if the passed in selector
to the library contains a comma separated selector like "foo, bar".
However if supporting commaseparated queries is critical for libraries
then I see no other choise. We'll one way or another have to specify
our own syntax, though it can be heavily based on the productions in
the Selector spec.
/ Jonas
Libraries already parse selector queries anyway. And some of them add
non-standard selectors and presumeably will continue to do so. I don't think
it is an issue.
The input I've gotten from library developers is that they would love
to not have to ship a selector engine. Apparently it would reduce the
size of for example jQuery with about 10k which is pretty significant.
/ Jonas
They could. If something like the following is not sufficient it
probably means they aren't happy with the native selector engine. In
that case they will be providing their own anyway.
Element.prototype.queryScopedSelectorAll = function(selector) {
var validSel = ":scope " + selector.replace(",", ", :scope ");
return this.querySelectorAll(validSel);
}
