Viewport argument value “device-width;” for key “width” is invalid, and has been ignored. Note that

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.

使用

     <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, user-scalable=yes"> 

注意符号是英文状态下的