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Re: [whatwg] A mask="" advisory flag for <link rel=icon>

From: Justin Dolske <dolske@mozilla.com>
Date: Mon, 15 Jun 2015 17:40:32 -0700
Message-ID: <CAL6wruAVgGyZ5E3v1rmKV8rN57Yb31HvsHG3yDsSq_P2xLRYtA@mail.gmail.com>
To: Maciej Stachowiak <mjs@apple.com>
Cc: WHAT Working Group <whatwg@whatwg.org>, Elliott Sprehn <esprehn@chromium.org>, Edward O'Connor <eoconnor@apple.com>
Hmm, I suppose Elliott's proposal is a bit ambiguous, but I read it as
fixing the ordering issue by adding a separate "mask" rel value. Such that
the following are equivalent and independent of ordering:

A) <link rel=icon href=colorful.png><link rel=mask href=black.svg>
B) <link rel=mask href=black.svg><link rel=icon href=colorful.png>

And if  someone actually did want the same icon for both, they could do:

C) <link rel="icon mask" href=blackhole.svg>

Justin

On Mon, Jun 15, 2015 at 4:20 PM, Maciej Stachowiak <mjs@apple.com> wrote:

>
> > On Jun 15, 2015, at 3:55 PM, Elliott Sprehn <esprehn@chromium.org>
> wrote:
> >
> > Adding a whole new attribute for this seems like overkill, why not use
> the
> > rel.
> >
> > <link rel="icon mask" href="..." sizes="...">
> >
> > That's what the rel list was designed for.
>
> In general, rel values are supposed to be orthogonal, they should not
> modify each other’s meanings. rel=“alternate stylesheet” and rel=“shortcut
> icon” are two specific historical exceptions. But rel=“license help” means
> the link is both the license and the help for the page, not that it’s help
> about the license or anything like that.
>
> So I don’t think it would be a good pattern to use the rel value for this.
>
> It also wouldn’t solve the immediate problem with browsers getting the
> wrong icon because sites didn’t carefully set the correct order. Perhaps we
> don’t care about solving that, but if so, I’m not sure it’s an improvement.
>
>  - Maciej
>
> >
> > On Mon, Jun 15, 2015 at 10:37 AM, Edward O'Connor <eoconnor@apple.com>
> > wrote:
> >
> >> When <link> is used to pull in external resources, authors may use
> >> several attributes as hints about the linked resource to help UAs decide
> >> whether or not to load it.
> >> ...
> >>
> >> This combines well with the other resource hints we already have:
> >>
> >>    <link rel=icon href=mask.svg type=image/svg+xml sizes=any mask>
> >>
> >> There are any number of properties UAs might want to use when deciding
> >> whether or not to load a resource, so you might think we shouldn't add a
> >> new, one-off attribute every time we identify one. Instead, we could add
> >> a generic hints attribute and have it take a space-separated list of
> >> advisory info about the resource.
> >
> >
> > That space separated list already exists, it's called rel.
> >
> > - E
>
>
Received on Tuesday, 16 June 2015 00:40:59 UTC

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