CSS媒体查询动态引入资源文件

1.语法规范

<link rel="stylesheet" media="mediatype and|not|only (media feature)" href="mystylesheet.css">

2.举例

<link rel="stylesheet" href="style320.css" media="screen and (min-width:320px)"> <link rel="stylesheet" href="style640.css" media="screen and (min-width:640px)">

3.效果