我的項(xiàng)目中引入import 'element-ui/lib/theme-chalk/index.css';會(huì)報(bào)警告

import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
Vue.use(ElementUI);

警告導(dǎo)致引入后的樣式如下，這是不正確的效果。

image.png

警告如下：
意思是：elementui已經(jīng)有了content的屬性，請(qǐng)放棄覆蓋他

 warning  in ./node_modules/element-ui/lib/theme-chalk/index.css

(Emitted value instead of an instance of Error) postcss-viewport-units: E:\項(xiàng)目路徑\node_modules\element-ui\lib\theme-chalk\index.css:1:98603: '.el-tooltip__popper .popper__arrow:after' already has a 'content' property, give up to overwrite it.

 @ ./node_modules/element-ui/lib/theme-chalk/index.css 4:14-124 13:3-17:5 14:22-132
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://localhost:8888 webpack/hot/dev-server ./src/main.js

解決：
原因在于vw適配，導(dǎo)致第三方ui庫有問題
找到.postcssrc.js

image.png

刪除 postcss-viewport-units 對(duì)象

image.png

這樣運(yùn)行就不會(huì)報(bào)錯(cuò)了。