(Emitted value instead of an instance of Error) postcss-viewport-units:

报错信息：
(Emitted value instead of an instance of Error) postcss-viewport-units:
‘.mint-switch-core::after, .mint-switch-core::before’ already has a ‘content’ property, give up to overwrite it.
使用场景：
vue项目中使用Mint-UI，出现这个错误。
原因：
兼容性问题

解决方法：
升级一下postcss-px-to-viewport为postcss-px-to-viewport-opt:

npm i postcss-px-to-viewport-opt

.postcssrc.js中配置示例：

"postcss-px-to-viewport-opt": {viewportWidth: 750,     //  视窗的宽度，对应的是我们设计稿的宽度，移动端一般是750，如果是pc端那就是类似1920这样的尺寸viewportHeight: 1344,    // 视窗的高度，移动端一般指定1334，也可以不配置unitPrecision: 3,       // 指定`px`转换为视窗单位值的小数位数（很多时候无法整除）viewportUnit: 'vw',    // 指定需要转换成的视窗单位，建议使用vwselectorBlackList: ['.ignore', '.hairlines'],  // 指定不转换为视窗单位的类，可以自定义，可以无限添加,建议定义一至两个通用的类名minPixelValue: 1,      // 小于或等于`1px`不转换为视窗单位，你也可以设置为你想要的值mediaQuery: false,      // 允许在媒体查询中转换`px`exclude: /(\/|\\)(node_modules)(\/|\\)/
},

解决啦~

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