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POFeature detection for parallax / background-position
 

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  1. POFeature detection for parallax / background-position
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    <p>Ok, so I've created my own parallaxing jQuery/JS script, but I just don't know how to target browsers that will support the following (needs the following):</p> <ul> <li>Supports transition for background-position</li> </ul> <p>The site (preview) I'm trying this at is: <a href="http://bringmebusiness.com.au/downloads/test/" rel="nofollow">My Test Site</a></p> <p>How can I detect whether a browser will support this though? Can I run media queries bases on window width? Do I have to browser sniff? I can't see anything on the WWW that gives me clues as to how I can feature-detect for this.</p> <p>Any help would be greatly appreciated.</p> <p>My JS code is here: (please feel free to use it if you like it)</p> <pre><code>var goTop = 0; var thisGoTop = 0; var thisHeight = 0; var thisWinH = 0; var bottomIntrusion = 0; var thisMax = 0; var bgPos = 0; function parallax(){ goTop = $(window).scrollTop(); thisWinH = $(window).height(); $('div.para').each(function(){ thisGoTop = $(this).offset().top; thisHeight = $(this).height(); thisMax = Math.floor(thisHeight * 0.3); bottomIntrusion = (thisGoTop + (thisHeight / 2) - goTop) / thisWinH; if (bottomIntrusion &gt; 0) { bgPos = 0 - (Math.floor(thisMax * bottomIntrusion)); $(this).css('background-position','center ' + bgPos + 'px'); } }); } parallax(); $(window).scroll(function(){ parallax(); }); </code></pre> <p><strong>Edit:</strong> I've looked into the Modernizr library, and I haven't found anything that gives me clues about background-position transform support for CSS3. I'm getting real close to brower sniffing at this point, and I'd hate to go there.</p>
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    1. US3Dom
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    1. COTake a look at http://modernizr.com/ or more specifically this section: http://modernizr.com/docs/#features-css
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    2. COWhat section James? Can anyone point me in the right direction, based on solid experience?
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      1. US3Dom
    3. COAh well waddya know... it doesn't specifically have that plumbed in... doh. So what you'll have to do (and feel free to make an extension of the modernizr library, but if you cba.. which I can never be... wait for my answer and that should do the job)
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