开发报错-The key "" is not recognized and ignored.

打开一网页，chrome控制台报警告:The key “” is not recognized and ignored

HTML 代码：
<meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />

错误原因

一、书写错误

minimum-scale 写成 minmum-scale
maximum-scale 写成 maxmum-scale

二、meta 有多余空格

参考：https://blog.youkuaiyun.com/dragoo1/article/details/51381964