Viewport argument value "device-width;" for key "width" is invalid, and has been ignored. Note that ';' is not a separator in viewport values. The list should be comma-separated.
页面上写：
<meta content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0" name="viewport" />
会报如上的一些警告。
解决方法：(逗号替代分号，分号在html中代表结束)
<!-- <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" /> -->