const path = require('path');
module.exports = {
    entry: 'app',
    module: {
        loaders: [
            {
                test: /.html$/,
                loader: 'underscore-template-loader',
                query: {
                    engine: 'underscore',
                    prependFilenameComment: __dirname,
                },
            },
            {
                test: /.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader',
                query: {
                    presets: [
                        'es2015',
                        'es2016',
                        'es2017',
                        'stage-3',
                    ],
                },
            },
        ],
    },
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist'),
        sourceMapFilename: '[file].map',
    },
    resolve: {
        modules: [
            path.join(__dirname, 'src'),
            'node_modules',
        ],
    },
    devtool: 'source-map',
    plugins: [],
};

_.forEach([1,2,3], (e) => {console.log(e);});

<% _.forEach(test, (e) => { %>
  <p>From template <%- e %></p>
<% }); %>

_.forEach(test, (e) => {         // not transpiled :(
__p+='n  <p>From template '+
((__t=( e ))==null?'':_.escape(__t))+
'</p>n';
 });

...

_underscore2.default.forEach([1, 2, 3], function (e) { // transpiled
  console.log(e);
});

{
  test: /.html$/,
  loader: "babel?presets=[es2015]!underscore-template-loader?engine=underscore"
}

{
    test: /.html$/,
    use: [
      {
           loader: 'underscore-template-loader',
            options: {
                engine: 'underscore',
                prependFilenameComment: __dirname,
            },
      },
      {
            loader: 'babel-loader',
            options: {
                presets: [
                    'es2015',
                    'es2016',
                    'es2017',
                    'stage-3',
                ],
            }
      }
    ]
  }