On Wed, Jul 20, 2011 at 1:31 PM, Marius Gedminas <[email protected]> wrote:
> On Wed, Jul 20, 2011 at 09:52:26AM -0700, Mike Orr wrote:
>> * HTML 5 has a lame-brained definition of boolean attributes. If the
>> attribute has any value including '', it's true. To make the attribute
>> false you have to remove it completely. That's impossible to express
>> in a 'kw = value' expression, so you'd have to have something
>> higher-level than that.
>
> You could have a convention that attributes specified as 'kw = value'
> expressions are omitted from the output when the value evaluates to
> None. Zope Page Templates act like that
Actually, the tag helpers do that already.
h.select("name", [], ["A", "B"],
disabled="disabled" if not IS_ENABLED else None)
So that's the shortest way to set a boolean attribute that the helper
doesn't have syntactical support for.
--
Mike Orr <[email protected]>
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