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bjankord/gist:2509672

Created April 27, 2012 14:23
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Picture element with HTML media query variables
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gistfile1.html
<head>
<mqs>
<var name=”s@2x” media=”-webkit-min-device-pixel-ratio:2,-moz-min-device-pixel-ratio:2,-o-min-device-pixel-ratio: 2/1,min-device-pixel-ratio:2” />
<var name=”m” media=”min-width:321px” />
<var name=”m@2x” media=”min-width:321px and -webkit-min-device-pixel-ratio:2,-moz-min-device-pixel-ratio:2,-o-min-device-pixel-ratio: 2/1,min-device-pixel-ratio:2” />
<var name=”l” media=”min-width:641px” />
<var name=”l@2x” media=”min-width:641px and -webkit-min-device-pixel-ratio:2,-moz-min-device-pixel-ratio:2,-o-min-device-pixel-ratio: 2/1,min-device-pixel-ratio:2” />
<var name=”xl” media=”min-width:1281px” />
<var name=”xl@2x” media=”min-width:1281px and -webkit-min-device-pixel-ratio:2,-moz-min-device-pixel-ratio:2,-o-min-device-pixel-ratio: 2/1,min-device-pixel-ratio:2” />
</mqs>
</head>
<body>
<picture alt="Alt tag describing the image represented">
<source src="photo-s.jpg"/>
<source src="photo-s@2x.jpg" media="var-s@2x"/>
<source src="photo-m.jpg" media="var-m"/>
<source src="photo-m@2x.jpg" media="var-m@2x"/>
<source src="photo-l.jpg" media="var-l"/>
<source src="photo-l@2x.jpg" media="var-l@2x"/>
<source src="photo-xl.jpg" media="var-l" />
<source src="photo-xl@2x.jpg" media="var-l@2x" />
<img src="photo-s.jpg" />
</picture>
</body>
// Notes
//----------------------------------------------------------------
<mqs></mqs> would be a new element that would be used in the <head> of the
document. Developers could write their media queries for picture elements
once and have it be used for each picture element. This would keep picture
elements DRY and also keep the markup clean. The var element would work similar
to the proposed CSS variable syntax. http://dev.w3.org/csswg/css-variables/
Ideally these could be used on the picture element, but could also be used
by Javascript and CSS in separate linked files.
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