项目中安装lib-flexible
npm install lib-flexible --save
cnpm install postcss-pxtorem --save-dev
文件根部新建一个postcss.config.js文件
const autoprefixer = require('autoprefixer')
const px2rem = require('postcss-pxtorem')
module.exports = {
plugins: [autoprefixer(), px2rem({ rootValue: 75, unitPrecision: 5, propList: ['*'] })]
}