Where does 'extract-text-webpack-plugin' save files?

Question

webpack

Guys
here is the code:

var ExtractTextPlugin = require('extract-text-webpack-plugin');
module.exports = {
    entry: './app.js',
    output: {
        filename: "bundle.js"
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader'
            },
            {
                test: /\.styl$/,
                loader: ExtractTextPlugin.extract({
                    fallback: "style-loader",
                    use: ["css-loader", "stylus-loader"],
                    publicPath: '/css'
                })
            }
        ]
    },
    plugins: [
        new ExtractTextPlugin('bundle.css')
    ]
};

Where does webpack save the bundle.css file? Does it save at all? Styles come to the page, but physically the file is not in the directory.
Thank you!

Answer 1

Forgot to specify path:

output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'bundle.js'
    }