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December 19, 2012 22:10
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Use CSS viewport units with jQuery
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> | |
| <script src="v2p.js"></script> | |
| <style type="text/css" media="all"> | |
| body { margin: 0; } | |
| div { | |
| background: #fa7098; | |
| } | |
| </style> | |
| <meta charset=utf-8 /> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <div>hello</div> | |
| <script type="text/javascript" charset="utf-8"> | |
| $('div').css({ | |
| height: '50vh', | |
| width: '50vw', | |
| marginTop: '25vh', | |
| marginLeft: '25vw', | |
| fontSize: '10vw' | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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| /* | |
| * CSS viewport units with jQuery | |
| * http://www.w3.org/TR/css3-values/#viewport-relative-lengths | |
| */ | |
| /* | |
| * CSS viewport units with jQuery | |
| * http://www.w3.org/TR/css3-values/#viewport-relative-lengths | |
| */ | |
| ;(function( $, window ){ | |
| var $win = $(window) | |
| , _css = $.fn.css; | |
| function viewportToPixel( val ) { | |
| var percent = val.match(/[\d.]+/)[0] / 100, | |
| unit = val.match(/[vwh]+/)[0]; | |
| return (unit == 'vh' ? $win.height() : $win.width()) * percent +'px'; | |
| } | |
| function parseProps( props ) { | |
| var p, prop; | |
| for ( p in props ) { | |
| prop = props[ p ]; | |
| if ( /[vwh]$/.test( prop ) ) { | |
| props[ p ] = viewportToPixel( prop ); | |
| } | |
| } | |
| return props; | |
| } | |
| $.fn.css = function( props ) { | |
| var self = this, | |
| update = function() { | |
| return _css.call( self, parseProps( $.extend( {}, props ) ) ); | |
| }; | |
| $win.resize( update ).resize(); | |
| return update(); | |
| }; | |
| }( jQuery, window )); |
How use margin: -20...?
// (...)
marginTop: -'25vh',
marginLeft: '-25vw',
// (...)is ignored.
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But how to deel with the media query?