scss配置：

npm install node-sass –save-dev 
npm install sass-loader –save-dev

第二、完成后，在build文件夹下的webpack.base.conf.js的module中的rules里面添加配置，整个对象粘贴进去就行。

{
    test: /\.scss$/, 
    loaders: ["style", "css", "sass"] 
  }

px2rem配置
安装

npm install px2rem-loader --save-dev

配置util.js文件

'use strict'
const path = require('path')
const config = require('../config')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const packageConfig = require('../package.json')

exports.assetsPath = function (_path) {
const assetsSubDirectory = process.env.NODE_ENV === 'production'
? config.build.assetsSubDirectory
: config.dev.assetsSubDirectory

return path.posix.join(assetsSubDirectory, _path)
}

exports.cssLoaders = function (options) {
options = options || {}

const cssLoader = {
loader: 'css-loader',
options: {
sourceMap: options.sourceMap
}
}

const postcssLoader = {
loader: 'postcss-loader',
options: {
sourceMap: options.sourceMap
}
}

 const px2remLoader = {

    loader: 'px2rem-loader',
    
    options: {
    
    remUnit:75 // 根据设计稿尺寸定，375px的用37.5， 750px 的用75， 页面书写单位按照实际设计稿px 书写
    
    }
    
    }

// generate loader string to be used with extract text plugin
function generateLoaders (loader, loaderOptions) {

const loaders = options.usePostCSS ? [cssLoader, postcssLoader, px2remLoader] : [cssLoader]

  if (loader) {loaders.push({
loader: loader + '-loader',
options: Object.assign({}, loaderOptions, {sourceMap: options.sourceMap})
})
}

if (loader) {
loaders.push({
loader: loader + '-loader',
options: Object.assign({}, loaderOptions, {
sourceMap: options.sourceMap
})
})
}
// Extract CSS when that option is specified
// (which is the case during production build)
if (options.extract) {
return ExtractTextPlugin.extract({
use: loaders,
fallback: 'vue-style-loader'
})
} else {
return ['vue-style-loader'].concat(loaders)
}
}

// https://vue-loader.vuejs.org/en/configurations/extract-css.html
return {
css: generateLoaders(),
postcss: generateLoaders(),
less: generateLoaders('less'),
sass: generateLoaders('sass', { indentedSyntax: true }),
scss: generateLoaders('sass'),
stylus: generateLoaders('stylus'),
styl: generateLoaders('stylus')
}
}

// Generate loaders for standalone style files (outside of .vue)
exports.styleLoaders = function (options) {
const output = []
const loaders = exports.cssLoaders(options)

for (const extension in loaders) {
const loader = loaders[extension]
output.push({
test: new RegExp('\.' + extension + '$'),
use: loader
})
}

return output
}

exports.createNotifierCallback = () => {
const notifier = require('node-notifier')

return (severity, errors) => {
if (severity !== 'error') return const error = errors[0]
const filename = error.file && error.file.split('!').pop()
notifier.notify({
title: packageConfig.name,
message: severity + ': ' + error.name,
subtitle: filename || '',
icon: path.join(__dirname, 'logo.png')
})
}
}