lazyload-image.html 2.3 KB

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  1. <!DOCTYPE html>
  2. <html>
  3. <head>
  4. <meta charset="utf-8">
  5. <title>Hello MUI</title>
  6. <meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1,user-scalable=no">
  7. <meta name="apple-mobile-web-app-capable" content="yes">
  8. <meta name="apple-mobile-web-app-status-bar-style" content="black">
  9. <!--标准mui.css-->
  10. <link rel="stylesheet" href="../css/mui.min.css">
  11. <!--App自定义的css-->
  12. <link rel="stylesheet" type="text/css" href="../css/app.css" />
  13. <style type="text/css">
  14. p {
  15. text-indent: 22px;
  16. }
  17. .des {
  18. margin: .5em 0;
  19. }
  20. .des>li {
  21. font-size: 14px;
  22. color: #8f8f94;
  23. }
  24. </style>
  25. </head>
  26. <body>
  27. <header class="mui-bar mui-bar-nav">
  28. <a class="mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a>
  29. <h1 class="mui-title">lazyload(延迟加载) </h1>
  30. </header>
  31. <div class="mui-content">
  32. <div class="mui-content-padded">
  33. <p>延迟加载的理念:页面初始化时,暂不加载处于屏幕可见区域之外的图片。该方案会有如下几大好处:</p>
  34. <ul class="des">
  35. <li>加快页面渲染速度</li>
  36. <li>提升页面滚动性能</li>
  37. <li>默认不下载屏幕外的图片,减少网络流量</li>
  38. </ul>
  39. </div>
  40. <ul id="list" class="mui-table-view mui-table-view-chevron">
  41. </ul>
  42. </div>
  43. </body>
  44. <script src="../js/mui.min.js "></script>
  45. <script src="../js/mui.lazyload.js"></script>
  46. <script src="../js/mui.lazyload.img.js"></script>
  47. <script>
  48. mui.init();
  49. var createFragment = function(count) {
  50. var fragment = document.createDocumentFragment();
  51. var li;
  52. for (var i = 0; i < count; i++) {
  53. li = document.createElement('li');
  54. li.className = 'mui-table-view-cell mui-media';
  55. li.innerHTML = '<a class="mui-navigate-right"><img class="mui-media-object mui-pull-left" data-lazyload="http://www.dcloud.io/hellomui/images/' + (i % 5 + 1) + '.jpg?version=' + Math.random() * 1000 + '"><div class="mui-media-body">主标题<p class="mui-ellipsis">列表二级标题</p></div></a>';
  56. fragment.appendChild(li);
  57. }
  58. return fragment;
  59. };
  60. (function($) {
  61. var list = document.getElementById("list");
  62. list.appendChild(createFragment(50));
  63. $(document).imageLazyload({
  64. placeholder: '../images/60x60.gif'
  65. });
  66. })(mui);
  67. </script>
  68. </html>