webpack.config.js

var path = require('path');
var webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');

var extractPlugin = new ExtractTextPlugin({
   filename: 'bundle.css'
});

module.exports = {
	entry: './src/js/main.js',
	output: {
		path: path.resolve(__dirname, 'dist'),
		filename: 'bundle.js',
	//	publicPath: '/dist'
	},
	module: {
		rules: [
			{
				test: /\.css$/,
				use: [
					'style-loader',  // 這個後 (順序很重要)
					'css-loader' // 這個先
				]
			},
            {
                test: /\.js$/,
                use: [
                    {
                        loader: 'babel-loader',
                        options: {
                            presets: ['es2015']
                        }
                    }
                ]
            },
            {
                test: /\.scss$/,
                use: extractPlugin.extract({
                    use: [
						'css-loader', 
						'sass-loader'
					]
                })
            }
		]
	},
	plugins: [
		new webpack.optimize.UglifyJsPlugin(function(){
			// ...
		}),
		new webpack.ProvidePlugin({
			$: 'jquery',
			jQuery: 'jquery'
		}),
		extractPlugin
	]
}