vue - vue-loader.conf

 'use strict'
 // 工具=> build/util.js
 const utils = require('./utils')
 // 配置=> build/config/index.js
 const config = require('../config')

 const isProduction = process.env.NODE_ENV === 'production'
 const sourceMapEnabled = isProduction
   ? config.build.productionSourceMap
   : config.dev.cssSourceMap

 //对象模块导出{}
 module.exports = {
   loaders: utils.cssLoaders({
     sourceMap: sourceMapEnabled,
     extract: isProduction
   }),
   cssSourceMap: sourceMapEnabled,
   cacheBusting: config.dev.cacheBusting,
   transformToRequire: {
     video: ['src', 'poster'],
     source: 'src',
     img: 'src',
     image: 'xlink:href'
   }
 }