webpack.config.js

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

module.exports = {
    entry: {
        javascript: './public/javascripts/app.jsx'
    },

    output: {
        path: __dirname + "/public",
        filename: 'bundle.js'
    },

    resolve: {
        extensions: ['', '.js', '.jsx']
    },

    module: {
        loaders: [
            {
                test: /\.jsx$/,
                loaders: ["babel-loader"]
            },
            {
                test: /\.less$/,
                loader: ExtractTextPlugin.extract(
                    'css?sourceMap!' +
                    'less?sourceMap'
                )
            },
            {   test: /\.(png|jpg|svg)$/,
                loader: 'url-loader?limit=8192'
            }
        ]
    },
    plugins: [
        new ExtractTextPlugin('bundle.css')
    ],
    devtool: '#inline-source-map'
};