荔枝FM
<meta name="viewport" content="width=640, user-scalable=no, target-densitydpi=device-dpi">
网易
<meta content="target-densitydpi=device-dpi,width=640,user-scalable=no" name="viewport">这两个移动站都设置了target-densitydpi=device-dpi这个属性，我查了一下腾讯是这么说的
网上其他的文章是这么说的
2，这个属性只对android系统起作用，专有属性。iOS不支持它，所以说起来，还是有兼容性问题，如果页面是兼容IOS和android的话。让我越来越蒙了，这个属性是用来干嘛的？兼容性差的话有必要用吗？
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
target-densitydpi is a private attribute that represents the density level of the target device. is used to determine how many physical pixels 1px in CSS represents
The target-densitydpi value can be a numeric value or one of the strings high-dpi, medium-dpi, low-dpi, device-dpi
Special note is that when target-densitydpi=device-dpi, 1px in css will be equal to 1px in physical pixels.
Because this attribute is only supported by Android, and Android has decided to abandon the target-densitydpi attribute, try to avoid using this attribute.