Re: [svg2] tabindex and defaults

On Mon, Mar 31, 2014 at 7:57 PM, Cameron McCormack <cam@mcc.id.au> wrote:

> Rik Cabanier:
> > There are some differences for tabIndex between
> > 1.https://svgwg.org/svg2-draft/types.html#__svg__SVGElement__tabindex
> > and
> > 2: https://svgwg.org/svg2-draft/interact.html#sequential-
> > focus-navigation-and-the-tabindex-attribute
> >
> > 1. There is a difference in casing.
> > 1 defines it as 'tabIndex' while 2 as 'tabindex'. I assume it should be
> the
> > former since that follows HTML (and Erik's patch)
>
> I think the spec is right: the content attribute is named tabindex=""
> and the IDL attribute is named tabIndex.  Or did I miss a case where
> it's wrong?
>
> > 2. There is a difference in allowed value
> > The idl in 1 says that the default is 0, while 2 states that tabindex is
> > undefined by default. Should we follow 2?
>
> (1) says that the default is 0 for elements that are "directly
> focusable", and -1 otherwise.  (2) says there is no lacuna value for the
> attribute.
>
> I think it would be better to define that as part of the lacuna value
> for the content attribute.  Not sure we have text that says how to
> reflect invalid/missing content attributes when they have a lacuna
> value, but we should, and that's where the default value of
> SVGElement.tabIndex should come from.


Should it be optional in the IDL for SVGElement then?