移动适配代码怎么写？

1、<meta   name="viewport" content="width=device-width,   initial-scale=1.0"><meta name="applicable-device"   content="pc,mobile"> 

1、PC端页面head标签内对应添加如下代码：<meta name="applicable-device" content="pc">   

2、 移动端页面head标签内对应添加如下代码：

<meta name="applicable-device" content="mobile">

1、PC端页面head标签内对应添加如下代码：    <meta name="applicable-device" content="pc">       <link rel=“alternate” media=“only screen and(max-width: 640px)”   href=“http://m.shangqw.cn /" >

2、    移动端页面head标签内对应添加如下代码：    <meta name="applicable-device"   content="mobile">    <link rel="canonical" http://www.shangqw.cn / ">