使用webpack css-loader的Sourcemaps

我在努力使css-loader使用sourcemaps。

在控制台中输出：

来自css-loader的文档怎么说：

源图

要包括SourceMaps，请设置sourceMap查询参数。

require（“ css-loader？sourceMap！./ file.css”）

我的webpack.config

var webpack = require('webpack')

module.exports = {
  entry: './src/client/js/App.js',

  output: {
    path: './public',
    filename: 'bundle.js',
    publicPath: '/'
  },

  plugins: process.env.NODE_ENV === 'production' ? [
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.optimize.UglifyJsPlugin()
  ] : [],

  module: {
    loaders: [
      { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader?presets[]=es2015&presets[]=react' },
      { test: /\.scss$/, loaders: ['style', 'css', 'sass']},
      { test: /\.css$/, loader: "style-loader!css-loader?sourceMap!./file.css" },
      { test: /\.png$/, loader: "url-loader?limit=100000" },
      { test: /\.jpg$/, loader: "file-loader" }
    ]
  }
}

我如何包括无礼

import React from 'react'
import { render } from 'react-dom'
import { Router, browserHistory } from 'react-router'
import routes from './routes'
import '../scss/main.scss'

render(
  <Router routes={routes} history={browserHistory}/>,
  document.getElementById('app')
)