W3C home > Mailing lists > Public > www-style@w3.org > January 2014

Re: Proposal for image placeholder

From: Andrew Fedoniouk <news@terrainformatica.com>
Date: Fri, 17 Jan 2014 20:16:01 -0800
Message-ID: <CALRQH79e643zftwWecadzwJpkJsK3h2LWTq45Zppg_+svFCAvA@mail.gmail.com>
To: Brad Kemper <brad.kemper@gmail.com>
Cc: "Tab Atkins Jr." <jackalmage@gmail.com>, Binyamin <7raivis@inbox.lv>, www-style list <www-style@w3.org>
On Fri, Jan 17, 2014 at 3:34 PM, Brad Kemper <brad.kemper@gmail.com> wrote:
>
>
>> On Jan 17, 2014, at 11:30 AM, "Tab Atkins Jr." <jackalmage@gmail.com> wrote:
>>
>>> High priority need for placeholder is for resource priorities
>>> http://www.w3.org/TR/resource-priorities/. And since resource-priorities
>>> applies also to background-image, background is not a solution for
>>> placeholder. That means there is a need for new property like "placeholder".
>>
>> What is the placeholder for?  Why don't resource priorities apply to
>> the placeholder image as well?
>>
>> ~TJ
>>
>
> Maybe something like this:
>
> img.big {
>     width: 1200px;
>     height: 1200px;
> }
> img.big:not-loaded {
>     content: "chill, while we load this image";
>     border: 2px solid red;
>     display: table-cell;
>     vertical-align: middle;
>     color: white;
>     background-color: #444;
> }

I've found that there is a need for two state flags (a.k.a. pseudo-classes)
in practice:
  :busy - element (e.g. img, object, frame, etc.) is loading its data - has
             pending data delivery requests
  :incomplete - data delivery request has failed, e.g. no image on that URL.

Having these we can define the following:

img:busy { background-image: url(that-spinning-thing.gif); }
img:incomplete:not(:busy) : { background-image: url(no-image-placeholder.gif); }

My 2 sciter coins.

-- 
Andrew Fedoniouk.

http://terrainformatica.com
Received on Saturday, 18 January 2014 04:16:29 UTC

This archive was generated by hypermail 2.4.0 : Friday, 25 March 2022 10:08:38 UTC