src
 |-- class.js
 |-- module.js

build
 |-- src
      |-- class.js
      |-- module.js

import c from './src/class.js'

let d = c(10, 20);

"use strict";

var _interopRequire = function (obj) {
  return obj && (obj["default"] || obj);
};

var c = _interopRequire(require("./src/class.js"));

var d = c(10, 20);

class A extends B {}

ERROR in Entry module not found: Error: Cannot resolve module 'script' in %PATH%

var path = require('path');

module.exports = function(grunt) {

    grunt.loadNpmTasks('grunt-webpack');

    grunt.initConfig({

        // Read configuration from package.json
        pkg: grunt.file.readJSON('package.json'),

        // webpack
        webpack: {
            // common
            options: {

                entry: './httpdocs/js/project.js',
                output: {
                    //path: path.join(__dirname, 'build'),
                    filename: 'bundle.js'
                },
                module: {
                    loaders: [
                        {test: /\.js$/, loader: 'script'}
                    ]
                }
            },
            start: {

            }
        }

    });

    grunt.registerTask('default', ['webpack:start']);
};

module: {
	                    loaders: [
	                        {test: /\.js$/, loader: 'script'}
	                    ]
	                }

module: {
        loaders: [
            {test: /\.js$/, loader: '6to5'}
        ]
    }

"devDependencies": {
      "6to5": "^2.13.1",
      "6to5-loader": "^2.0.0",
      "grunt": "^0.4.5",
      "grunt-webpack": "^1.0.8",
      "webpack": "^1.5.1",
      "webpack-dev-server": "^1.7.0"
    }

//{test: /\.js$/, loader: '6to5'}

<script src="/js/bootstrap.js"></script>

<script>
    <!-- тут ошибка require is undefined -->
    require('/js/native/plugins/core.js');
</script>

// POLYFILLS
require('./polyfills/console-sham.min.js');


// NATIVE
require('./native/plugins/core.js');
require('./native/plugins/object-traverse.min.js');
require('./native/plugins/object-to-formdata.min.js');


// JQUERY
require('./jquery/jquery-1.8.3.min.js');

// JQUERY PLUGINS
require('./jquery/plugins/jquery.ui.touch-punch-0.2.2.min.js');
require('./jquery/plugins/jquery.chosen-1.1.0.min.js');
//require('./jquery/plugins/bootstrap-datepicker.js');


// ANGULAR
require('./angular/angular-1.2.18.min.js');

// ANGULAR MODULES
require('./angular/modules/angular-touch-1.2.9.min.js');

require is not defined