Created
November 14, 2014 19:02
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Transition <body> background-color on scroll
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| <script src="http://code.jquery.com/jquery-2.1.1.min.js"></script> | |
| <script> | |
| var sections = []; | |
| function isScrolledIntoView(elem) | |
| { | |
| var docViewTop = $(window).scrollTop(); | |
| var docViewBottom = docViewTop + $(window).height(); | |
| var elemTop = $(elem).offset().top; | |
| var elemBottom = elemTop + $(elem).height(); | |
| return ((elemBottom <= docViewBottom) && (elemTop >= docViewTop)); | |
| } | |
| function getSections() { | |
| $('section').each(function() { | |
| sections.push($(this).attr("id")); | |
| }); | |
| } | |
| $(function(){ | |
| getSections(); | |
| $(window).scroll(function(){ | |
| $.each(sections, function(index, value){ | |
| if (isScrolledIntoView("#" + value)) { | |
| if(!$('body').hasClass(value)) { | |
| $('body').attr('class', ''); | |
| $('body').addClass(value); | |
| } | |
| } | |
| }); | |
| }); | |
| }); | |
| </script> |
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