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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>安科教程(www.ancii.com)</title> <style> img { -webkit-animation: mymove 7s infinite; /* Chrome, Safari, Opera */ animation: mymove 7s infinite; } /* Chrome, Safari, Opera */ @-webkit-keyframes mymove { 50% { -webkit-filter: grayscale(100%); filter: grayscale(100%); } } /* Standard syntax */ @keyframes mymove { 50% { -webkit-filter: grayscale(100%); filter: grayscale(100%); } } </style> </head> <body> <p>逐步改变图片的背景颜色，从黑到白 (100% 灰阶):<p> <img src="https://img.s.ancii.com/tutorial/archive/attachments/cover/cover_css3.jpeg" alt="Pineapple" width="300" height="300"> <p>filter 属性支持动画效果。</p> <p><b>注意：</b>Internet Explorer 9 及更早 IE 版本不支持 CSS 动画。</p> </body> </html>
运行结果
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