Uncaught TypeError: Class constructor Smooth cannot be invoked without 'new'

[wezzou1]

Hi, nice smooth-scroll, really love it, but when I try to extends Parallax with smooth-scroll I've got this message, I don't really know why... but I think it's something with my webpack? or something,,

The error

Uncaught TypeError: Class constructor Smooth cannot be invoked without 'new'

var Parallax = function (_Smooth) {
	_inherits(Parallax, _Smooth);

	function Parallax(opt) {
		_classCallCheck(this, Parallax);

                 <!----- This line --->
		var _this = _possibleConstructorReturn(this, (Parallax.__proto__ || Object.getPrototypeOf(Parallax)).call(this, opt));
                 <!--- end of line --->

		_this.createExtraBound();
		_this.resizing = false;
		_this.cache = null;
		_this.dom.divs = Array.prototype.slice.call(opt.divs, 0);
		return _this;
	}
...
}

My webpack.config

'use strict';

const path = require('path');
const webpack = require("webpack");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const SvgStore = require('webpack-svgstore-plugin');
require("babel-polyfill");

module.exports = {
	cache: false,
	context: path.resolve(__dirname, "src"),
	entry: {
		app: [
		"babel-polyfill", "./js/app.js"
		],
	},
	output: {
		filename: "[name].bundle.js",
	},
	resolve: {
		alias: {
			"TweenLite": path.resolve(__dirname, 'node_modules', 'gsap/src/uncompressed/TweenLite.js'),
			"TweenMax": path.resolve(__dirname, 'node_modules', 'gsap/src/uncompressed/TweenMax.js'),
			"TimelineLite": path.resolve(__dirname, 'node_modules', 'gsap/src/uncompressed/TimelineLite.js'),
			"TimelineMax": path.resolve(__dirname, 'node_modules', 'gsap/src/uncompressed/TimelineMax.js'),
			"ScrollMagic": path.resolve(__dirname, 'node_modules', 'scrollmagic/scrollmagic/uncompressed/ScrollMagic.js'),
			"animation.gsap": path.resolve(__dirname, 'node_modules', 'scrollmagic/scrollmagic/uncompressed/plugins/animation.gsap.js')
		}
	},
	module: {
		rules: [
		{
			test: /\.js$/,
			exclude: /node_modules\/(?!(dom7)\/).*/,
			use: [
			{
				loader: "babel-loader",
				options: { 
					presets: ["es2015"] 
				}
			}
			],
		},
		{
			test: /\.scss$/,
			use: [
			MiniCssExtractPlugin.loader,
			{ 
				loader: 'css-loader', 
				options: { 
					importLoaders: 1 
				}
			},
			{
				loader: 'sass-loader'
			}
			],
		},
		{
			test: /\.(png|woff|woff2|eot|ttf|svg)$/,
			loader: 'url-loader?limit=1000&name=[name]-[hash].[ext]'
		}
		],
	},
	externals: {
		'TweenMax': 'TweenMax'
	},
	plugins: [
		new MiniCssExtractPlugin({
			filename: "[name].bundle.css"
		}),
	    new SvgStore({
	      // svgo options
	      svgoOptions: {
	        plugins: [
	          { removeTitle: true }
	        ]
	      }
	    })
	],
};

How do i solve it?

[wezzou1]

I Solved it by install ify-loader https://github.com/browserify/ify-loader