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CSS Viewport Units with JavaScript
CSS3 introduces viewport-percentage length units, vh and vw, which are valuable for responsive layouts. However, the question arises of whether there exists a cross-browser JavaScript alternative for these units.
JavaScript/jQuery Alternative
Absolutely! jQuery can be leveraged to provide an alternative for viewport units. Here's a jQuery-based solution:
<code class="javascript">/* jQuery plugin to convert viewport units to pixels */ ;(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; } $.fn.css = function( props ) { var self = this , originalArguments = arguments , update = function() { if ( typeof props === 'string' || props instanceof String ) { if (originalArguments.length > 1) { var argumentsObject = {}; argumentsObject[originalArguments[0]] = originalArguments[1]; return _css.call(self, parseProps($.extend({}, argumentsObject))); } else { return _css.call( self, props ); } } else { return _css.call( self, parseProps( $.extend( {}, props ) ) ); } }; $win.resize( update ).resize(); return update(); }; }( jQuery, window )); **Usage:** </code>
$('div').css({
height: '50vh',
width: '50vw',
marginTop: '25vh',
marginLeft: '25vw',
fontSize: '10vw'
});
This solution seamlessly integrates the viewport unit conversion into jQuery's CSS method, allowing for easy resizing of elements based on viewport dimensions. **Safety Considerations**
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