webpack Loaders Config using preLoader for eslint, babel for jsx and css loader chaining.

Example

The following configuration can be used as a base config for bundling up your project as a library. Notice how the module config contains a list of preLoaders and loaders.

// webpack.config.js

var path = require('path');

module.exports = {
    entry: path.join(__dirname, '..', 'src/index.js'),
    output: {
        path: path.join(__dirname, '..', '/lib'),
        filename: outputFile,
        library: 'myCoolBundle.js',
        libraryTarget: 'umd',
        umdNamedDefine: true
    },
    module: {
        preLoaders: [
            {
                test: /(\.jsx|\.js)$/,
                loader: "eslint-loader",
                exclude: /node_modules/,
            }
        ],
        loaders: [
            {
                test: /(\.jsx|\.js)$/,
                loader: ['babel'],
                exclude: /(node_modules)/,
                include: path.join(__dirname, '..'),
                query: {
                    presets: [ 'es2015', 'react']
                }
            },
            {
                test: /\.scss$/,
                loaders: ["style-loader", "css-loader!sass-loader"]
            }
        ]
    },
    resolve: {
        root: path.resolve(__dirname, '..', './src'),
        extensions: ['', '.js', '.jsx', '.scss'],
        fallback: path.join(__dirname, '../node_modules')
    },
    eslint: {
        configFile: path.resolve(__dirname, '..', '.eslintrc'),
    }
};