var path = require('path');var webpack = require('webpack');module.exports = {  entry :{  "index": "./src/index/main.js",   //前台JS  "admin": "./src/admin/main.js"   //后台JS  },  output: {    path: path.resolve(__dirname, './dist'),    publicPath: '/dist/',    filename: '[name].js'  },  module: {    rules: [      {        test: /\.vue$/,        loader: 'vue-loader',        options: {          // vue-loader options go here        }      },      {        test: /\.js$/,        loader: 'babel-loader',        exclude: /node_modules/      },      {        test: /\.css$/,        loader: 'style-loader!css-loader?root=../'      },      {        test: /\.(eot|svg|ttf|woff|woff2)$/,        loader: 'file-loader'      },      {        test: /\.(png|jpe?g|gif|svg)(\?\S*)?$/,        loader: 'file-loader',        options: {          name: '[name].[ext]?[hash]'        }      }    ]  },  resolve: {    alias: {      'vue$': 'vue/dist/vue',    }  },  devServer: {    historyApiFallback: true,    noInfo: true  },    plugins: [        new webpack.optimize.UglifyJsPlugin({            compress: {                warnings: false            }        })    ]};if (process.env.NODE_ENV === 'production') {  module.exports.devtool = '#source-map';  // http://vue-loader.vuejs.org/en/workflow/production.html  module.exports.plugins = (module.exports.plugins || []).concat([    new webpack.DefinePlugin({      'process.env': {        NODE_ENV: '"production"'      }    }),    new webpack.optimize.UglifyJsPlugin({      compress: {        warnings: false      }    }),    new webpack.LoaderOptionsPlugin({      minimize: true    })  ])}

当webpack设置多入口且入口不在二级目录的时候（例如"./src/index/main.js"）,css-loader则必须设置root 指向上一级目录即为../  

暂时只能统一设置，当多入口不在同级目录有什么解决方式还未找到