var resizeTimer = false; $(window).resize('load', function() { if (resizeTimer !== false) { clearTimeout(resizeTimer); } resizeTimer = setTimeout(function() { winHeight = $(window).height(); }, 20); }); $(window).scroll(function(){ winScrollTop = $(window).scrollTop(); $('.invisible').each(function() { var itemTtop = $(this).offset().top; if( winScrollTop + winHeight > itemTtop ) { $(this).removeClass('invisible'); $(this).addClass('visibled'); } }); });
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