Syntax Error:
$--group-option-flex: 0 0 math.div(1, 5) * 100% !default;
^
Invalid CSS after "...-flex: 0 0 math": expected expression (e.g. 1px, bold), was ".div(1, 5) * 100% !"
in /Users/josh/Desktop/personal-center-web/node_modules/element-ui/packages/theme-chalk/src/common/var.scss (line 490, column 31)
解决办法： element-ui版本：
// package.json 文件
"element-ui": "~2.13.0",
