页面预加载loading
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style rel="stylesheet"> #loading{ position:absolute; width:300px; top:300px; left:50%; margin-left:-150px; text-align:center; padding:7px 0 0 0; font:bold 11px Arial, Helvetica, sans-serif; } </style> <script src="jquery.min.js"></script> <script> $(window).load(function(){ $("#loading").hide(); }) </script> </head> <body> <div id="loading"> Loading content, please wait.. <img src="loading.gif" mce_src="loading.gif" alt="loading.." /> </div> </body> </html>
另:
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:http://crusader12.com/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();
});
当然也可以访问作者的页面看看效果
http://lovefeel.top/marry/
其他效果:
实现:http://www.cnblogs.com/lhb25/p/loading-spinners-animated-with-css3.html
图:http://www.lanrentuku.com/sort/loading/