用戶通過點擊頁面左側的菜單，對應的頁面加載時伴隨著滑動過濾動畫，并帶有進度條效果。當然頁面的加載是Ajax驅動的，整個加載過渡過程非常流暢，非常好的用戶體驗。
HTML
HTML結構中，.cd-main包含頁面主體內容，.cd-side-navigation包含著側邊導航條，#cd-loading-bar則是用來做進度條動畫用的。
<nav class="cd-side-navigation"> <ul> <li> <a href="index.html" class="selected" data-menu="index"> <svg><!-- svg content here --></svg> Intro </a> </li> <li> <!-- ... --> </li> <!-- other list items here --> </ul> </nav> <!-- .cd-dashboard --> <main class="cd-main"> <section class="cd-section index visible"> <header> <div class="cd-title"> <h2>Animated Page Transition #2</h2> <span>Some text here</span> </div> <a href="#index-content" class="cd-scroll">Scroll Down</a> </header> <div class="cd-content" id="index-content"> <!-- content here --> </div> <!-- .cd-content --> </section> <!-- .cd-section --> </main> <!-- .cd-main --> <div id="cd-loading-bar" data-scale="1" class="index"></div> <!-- lateral loading bar -->
CSS
我們將.cd-side-navigation固定在頁面左側，并且設置它的高度為100%，這樣左側導航菜單就始終占據左側邊欄，右側主體內容滾動時，左側導航菜單不動。
.cd-side-navigation { position: fixed; z-index: 3; top: 0; left: 0; height: 100vh; width: 94px; overflow: hidden; } .cd-side-navigation ul { height: 100%; overflow-y: auto; } .cd-side-navigation::before { /* background color of the side navigation */ content: ''; position: absolute; top: 0; left: 0; height: 100%; width: calc(100% - 4px); background-color: #131519; } .cd-side-navigation li { width: calc(100% - 4px); } .cd-side-navigation a { display: block; position: relative; } .cd-side-navigation a::after { /* 4px line to the right of the item - visible on hover */ content: ''; position: absolute; top: 0; right: -4px; height: 100%; width: 4px; background-color: #83b0b9; opacity: 0; } .no-touch .cd-side-navigation a:hover::after { opacity: 1; }JavaScript
當我們點擊左側菜單時，調用triggerAnimation()函數，這個函數會觸發加載進度條動畫函數loadingBarAnimation()，接著加載頁面內容函數：loadNewContent()。
function loadingBarAnimation() { var scaleMax = loadingBar.data('scale'); if( scaleY + 1 < scaleMax) { newScaleValue = scaleY + 1; } // ... loadingBar.velocity({ scaleY: newScaleValue }, 100, loadingBarAnimation); }當新頁面被選中時，一個新的元素.cd-section將會被創建并且插入到DOM中，然后load()新的url內容。
function loadNewContent(newSection) { var section = $('<section class="cd-section overflow-hidden '+newSection+'"></section>').appendTo(mainContent); //load the new content from the proper html file section.load(newSection+'.html .cd-section > *', function(event){ loadingBar.velocity({ scaleY: scaleMax //this is the scaleY value to cover the entire window height (100% loaded) }, 400, function(){ section.addClass('visible'); var url = newSection+'.html'; if(url!=window.location){ //add the new page to the window.history window.history.pushState({path: url},'',url); } // ... }); }); }通過異步加載的頁面要返回上一頁歷史瀏覽記錄的話，可以點擊瀏覽器上的返回即可。返回上一頁同樣有過渡動畫效果。
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