Created
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 )); |
@mkormendy I believe it's done for the cases, when few scripts would be concatenated into one line and the script before the current one will have no last semicolon. It's better to have two semicolons rather than js error.
But how to deel with the media query?
How use margin: -20...?
// (...)
marginTop: -'25vh',
marginLeft: '-25vw',
// (...)is ignored.
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Why do you have a semi-colon at the beginning of your function code?