webpack.config.js

module.exports = {
  entry: {
    "modul1":"./src/main/webapp/js/product/main.js",
    "modul2":"./src/main/webapp/js/product/main2.js"
  },
  output: {
    path: __dirname,
    filename: './src/main/webapp/js/dist/[name].bundle.js'
  },
  resolve: {
    extensions: ['.js', '.vue'],
    alias: {
      vue: 'vue/dist/vue.esm.js',
    }
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        exclude: /node_modules/,
        loader: 'vue-loader',
        options: {
            loaders: {
              // Since sass-loader (weirdly) has SCSS as its default parse mode, we map
              // the "scss" and "sass" values for the lang attribute to the right configs here.
              // other preprocessors should work out of the box, no loader config like this nessessary.
              'scss': 'vue-style-loader!css-loader!sass-loader',
              'sass': 'vue-style-loader!css-loader!sass-loader?indentedSyntax'
            }
            // other vue-loader options go here
        }
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: "babel-loader",
      },
      {
        test: /\.(css|sass|scss)$/,
        loader: 'sass-loader',
      }
    ]
  }

};