页面预加载loading动画 再载入内容

默认情况下如果网站请求速度慢，所以会有一段时间的空白页面等等，用户体验效果不好，见到很多的页面都有预加载的效果，加载之前先加载一个动画，后台进程继续加载页面内容，当页面内容加载完之后再退出动画显示内容，这样的用户体验更好。

例如此链接：/C12HoverAlls/

这篇文章是从上面链接的内容上拔下来的，操作流程很简单，只有两部如下

首先定义一个loader.css文件，如下内容

.chromeframe {margin: 0.2em 0;background: #ccc;color: #000;padding: 0.2em 0;}#loader-wrapper {position: fixed;top: 0;left: 0;width: 100%;height: 100%;z-index:999999;}#loader {display: block;position: relative;left: 50%;top: 50%;width: 150px;height: 150px;margin: -75px 0 0 -75px;border-radius: 50%;border: 3px solid transparent;/* COLOR 1 */border-top-color: #FFF;-webkit-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */-ms-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */-moz-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -o-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ animation: spin 2s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */z-index:1001;}#loader:before {content: "";position: absolute;top: 5px;left: 5px;right: 5px;bottom: 5px;border-radius: 50%;border: 3px solid transparent;/* COLOR 2 */ border-top-color: #FFF;-webkit-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */-moz-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */-o-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */-ms-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ animation: spin 3s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */}#loader:after {content: "";position: absolute;top: 15px;left: 15px;right: 15px;bottom: 15px;border-radius: 50%;border: 3px solid transparent;border-top-color: #FFF;/* COLOR 3 */ -moz-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */-o-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */-ms-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */ -webkit-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */animation: spin 1.5s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */}@-webkit-keyframes spin {0%{ -webkit-transform: rotate(0deg); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: rotate(0deg); /* IE 9 */transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */}100%{-webkit-transform: rotate(360deg); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: rotate(360deg); /* IE 9 */transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */}}@keyframes spin {0%{ -webkit-transform: rotate(0deg); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: rotate(0deg); /* IE 9 */transform: rotate(0deg); /* Firefox 16+, IE 10+, Opera */}100%{-webkit-transform: rotate(360deg); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: rotate(360deg); /* IE 9 */transform: rotate(360deg); /* Firefox 16+, IE 10+, Opera */}}#loader-wrapper .loader-section {position: fixed;top: 0;width: 51%;height: 100%;background: #1abc9c; /* Old browsers */z-index: 1000;-webkit-transform: translateX(0); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: translateX(0); /* IE 9 */transform: translateX(0); /* Firefox 16+, IE 10+, Opera */}#loader-wrapper .loader-section.section-left {left: 0;}#loader-wrapper .loader-section.section-right {right: 0;}/* Loaded */.loaded #loader-wrapper .loader-section.section-left {-webkit-transform: translateX(-100%); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: translateX(-100%); /* IE 9 */transform: translateX(-100%); /* Firefox 16+, IE 10+, Opera */-webkit-transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000); transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000);}.loaded #loader-wrapper .loader-section.section-right {-webkit-transform: translateX(100%); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: translateX(100%); /* IE 9 */transform: translateX(100%); /* Firefox 16+, IE 10+, Opera */-webkit-transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000); transition: all 0.7s 0.3s cubic-bezier(0.645, 0.045, 0.355, 1.000);}.loaded #loader {opacity: 0;-webkit-transition: all 0.3s ease-out; transition: all 0.3s ease-out;}.loaded #loader-wrapper {visibility: hidden;-webkit-transform: translateY(-100%); /* Chrome, Opera 15+, Safari 3.1+ */-ms-transform: translateY(-100%); /* IE 9 */transform: translateY(-100%); /* Firefox 16+, IE 10+, Opera */-webkit-transition: all 0.3s 1s ease-out; transition: all 0.3s 1s ease-out;}/* JavaScript Turned Off */.no-js #loader-wrapper {display: none;}.no-js h1 {color: #222222;}#loader-wrapper .load_title {font-family:'Open Sans';color:#FFF; font-size:19px; width:100%; text-align:center; z-index:9999999999999; position:absolute; top:60%; opacity:1; line-height:30px; }#loader-wrapper .load_title span { font-weight:normal; font-style:italic; font-size:13px; color:#FFF; opacity:0.5;}

第二步：在网站页面header标签和body标签加入以下代码

// 引入jquery <!--页面加载start--><link rel="stylesheet" type="text/css" href="css/loader.min.css"><script type="text/javascript"> // 等待所有加载$(window).load(function(){$('body').addClass('loaded');$('#loader-wrapper .load_title').remove();}); </script> <div id="loader-wrapper"><div id="loader"></div><div class="loader-section section-left"></div><div class="loader-section section-right"></div><div class="load_title">正在加载LoveFeel站点<br><span>V1.0</span></div></div><!--页面加载end-->

HoverAlls页面源码如下操作，他先是加载一段json封装之后再显示内容的，我上面的代码省去了json的操作。

$(window).load(function(){$('body').addClass('loaded').Chameleon({'current_item':'hoveralls','json_url':'../Envato/items.json'});$('#loader-wrapper .load_title').remove();});

当然也可以访问我的页面看看效果

http://lovefeel.top/marry/

查看原文：/article/401.html

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