webpack.config.js

var webpack = require("webpack");
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
var path = require("path");
module.exports = {
    entry: {
        demo: path.resolve(__dirname, 'demo', 'index.jsx')
    },
    eslint: {
        configFile: '.eslintrc'
    },
    module: {
        loaders: [
            {
                test: /\.jsx?$/,
                loader: 'babel',
                exclude: /node_modules/,
                query: {
                    optional: ['spec.undefinedToVoid', 'runtime'],
                    stage: 0
                }
            },
            {
                test: /\.jsx?$/,
                loader: 'eslint',
                exclude: /node_modules/
            }
        ]
    },
    resolve: {
        extensions: ['', '.js', '.jsx']
    },
    output: {filename: 'demo.js', path: './demo/js'}
};