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Sticky Instagram-like Headers
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| //http://stackoverflow.com/questions/13279725/getting-a-sticky-header-to-push-up-like-in-instagrams-iphone-app-using-css-a | |
| function stickyTitles(stickies) { | |
| this.load = function() { | |
| stickies.each(function(){ | |
| var thisSticky = jQuery(this).wrap('<div class="followWrap" />'); | |
| thisSticky.parent().height(thisSticky.outerHeight()); | |
| jQuery.data(thisSticky[0], 'pos', thisSticky.offset().top); | |
| }); | |
| } | |
| this.resize = function() { | |
| stickies.each(function(){ | |
| var thisSticky = $(this); | |
| thisSticky.parent().height(thisSticky.outerHeight()); | |
| jQuery.data(thisSticky[0], 'pos', thisSticky.offset().top); | |
| }); | |
| } | |
| this.scroll = function() { | |
| stickies.each(function(i){ | |
| var thisSticky = jQuery(this), | |
| nextSticky = stickies.eq(i+1), | |
| prevSticky = stickies.eq(i-1), | |
| pos = jQuery.data(thisSticky[0], 'pos'); | |
| if (pos <= jQuery(window).scrollTop()) { | |
| thisSticky.addClass("fixed"); | |
| if (nextSticky.length > 0 && thisSticky.offset().top >= jQuery.data(nextSticky[0], 'pos') - thisSticky.outerHeight()) { | |
| thisSticky.addClass("absolute").css("top", jQuery.data(nextSticky[0], 'pos') - thisSticky.outerHeight()); | |
| } | |
| //added - replace the sticky header when it sticks | |
| if (thisSticky.find('.alt-sub').length !== 0) { | |
| if (thisSticky.find('.primary-sub').length !== 0) { | |
| thisSticky.find('.primary-sub').fadeOut("fast", function() { | |
| thisSticky.find('.alt-sub').fadeIn("fast"); | |
| }); | |
| } else { | |
| thisSticky.find('.alt-sub').fadeIn("fast"); | |
| } | |
| } | |
| } else { | |
| thisSticky.removeClass("fixed"); | |
| if (prevSticky.length > 0 && jQuery(window).scrollTop() <= jQuery.data(thisSticky[0], 'pos') - prevSticky.outerHeight()) { | |
| prevSticky.removeClass("absolute").removeAttr("style"); | |
| } | |
| //added - put the original content back | |
| if (thisSticky.find('.alt-sub').length !== 0) { | |
| if (thisSticky.find('.primary-sub').length !== 0) { | |
| thisSticky.find('.alt-sub').fadeOut("fast", function() { | |
| thisSticky.find('.primary-sub').fadeIn("fast"); | |
| }); | |
| } else { | |
| thisSticky.find('.alt-sub').fadeOut("fast"); | |
| } | |
| } | |
| } | |
| }); | |
| } | |
| } | |
| $(window).load(function() { | |
| //sticky headers | |
| var newStickies = new stickyTitles($(".sticky")); | |
| newStickies.load(); | |
| $(window).on("scroll", function() { | |
| newStickies.scroll(); | |
| }); | |
| $(window).resize(function() { | |
| newStickies.resize(); | |
| }); | |
| }); |
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A demo is here http://codepen.io/dukecroc/pen/yNJWQz