根本原理請看：https://github.com/vuejs-templates/webpack/issues/166

在我的項目中遇到的情形是：
打包后，css里加載的font文件路徑變成了：rootpath/static/css/static/fonts,
而期望的應(yīng)該是rootpath/static/fonts。
修改方式：在build/utils的ExtractTextPlugin.extract里加上 publicPath: '../../'：

// generate loader string to be used with extract text plugin
  function generateLoaders (loader, loaderOptions) {
    const loaders = [cssLoader]
    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',
        publicPath: '../../'  //加我叫我加我加我加我
      })
    } else {
      return ['vue-style-loader'].concat(loaders)
    }
  }