安科网
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <style> body { background-color:lightgreen; } @media screen and (max-width: 300px) { body { background-color:lightblue; } } </style> </head> <body> <p>重置浏览器查看大小。当浏览器窗口的宽度小于 300 像素时，背景颜色会变成淡蓝，否则是淡绿色。<input type="button" onclick="resize_window()" value="查看效果"></p> <SCRIPT> <!-- function resize_window() { window.open ('https://www.ancii.com/tryrun/demo_source/trycss3_media_example1.htm','newwindow','height=299,width=299,top=0,left=0,toolbar=no,menubar=no,scrollbars=no, resizable=no,location=no, status=no') } //写成一行 --> </SCRIPT> </body> </html>
运行结果
Copyright © 2013 - 2019 Ancii.com All Rights Reserved
京ICP备18063983号-5
京公网安备11010802014868号