Config did not export an object error thrown

[hozefaj]

I have the below webpack.config.js, but keep getting error Config did not export an object when running command npm run webpack --env.dev

Can you point to what I am doing incorrectly? Thanks.

const webpack = require('webpack');

module.exports = env => {
    const addPlugin = (add, plugin) => add ? plugin : undefined;
    const ifProd = plugin => addPlugin(env.prod, plugin);
    const removeEmpty = array => array.filter(i => !!i);

    return {
        entry: getEntrySources(['whatwg-fetch', './src/entry.js']),
        output: {
            path: __dirname + '/.build/js',
            filename: 'bundle.js',
        },
        devtool: 'cheap-module-source-map',
        module: {
            preLoaders: [{
                test: /\.jsx?$/,
                exclude: /(node_modules|bower_components)/,
                loaders: [
                    'source-map',
                ],
            },
          ],
            loaders: [{
                test: /\.less$/,
                include: /src/,
                loaders: [
                    'style',
                    'css',
                    'postcss?browsers=last 3 versions',
                    'less',
                ],
            }, {
                test: /\.(jpe?g|png|gif|svg)$/i,
                loaders: [
                    'url?limit=8192',
                    'img',
                ],
            }, {
                test: /\.jsx?$/,
                exclude: /(node_modules|bower_components)/,
                loaders: [
                    'react-hot',
                    'babel?presets[]=react,presets[]=es2015',
                    'eslint',
                ],
            }, {
                test: /\.json$/,
                include: /lib|node_modules/,
                loaders: [
                    'json',
                ],
            },
          ],
        },
        plugins: removeEmpty([
            ifProd(new webpack.optimize.UglifyJsPlugin({
                compress: {
                    warnings: false,
                    screw_ie8: true,
                },
            })),
        ]),
    };
};

function getEntrySources(sources) {
    return sources;
}

[kentcdodds]

You must be using version 2 of webpack (currently beta) to utilize the function API.

[hozefaj]

So if I am using version 2, how can I go about achieving a similar result?

[kentcdodds]

You shouldn't be getting that error with version 2. Make sure that's what you have, then file an issue with the Webpack project if you're still getting that error.