不用jQuery实现的动画效果代码_javascript技巧

不过随着新版本的升级, 体积也慢慢变大了.
24KB, Minified and Gzipped 155KB, Uncompressed Code
压缩并gzip输出24K, 也不小了.
如果页面上一个简单的效果,一个简单的动画就没必要载入这么大的库.
看下面这个图片渐变效果, 其实纯js不到20行就可以搞定了.

<meta content="text/html; charset=utf-8" http-equiv="Content-Type"> <style type="text/css"> <P>body {padding:0; margin:0;} #main {margin: 50px auto;border: 1px solid #ccc;width:700px} #main img {padding:0 20px; border:none; display:none}</style> <div id="main"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> <img src="/static/imghw/default1.png" data-src="http://www.jb51.net/images/logo.gif" class="lazy" alt="" style="max-width:90%" style="max-width:90%"> </div> <script type="text/javascript"> (function() { var imgs = document.getElementById('main').getElementsByTagName('img'), len = imgs.length, i = 0; (function() { var deep = 0, j = i++, timer = setInterval(function() { imgs[j].style.opacity = deep; imgs[j].style.filter = "alpha(opacity=" + deep * 100 + ")"; imgs[j].style.display = 'inline'; deep += 0.1; deep >= 1 && clearInterval(timer); }, 60); if (i >= len) return; setTimeout(arguments.callee, 1000); })(); })(); </script>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]