webpack.config.js

const path = require('path');

module.exports = {
    entry: './src/index.js',
    output: {
        filename: 'main.js',
        path: path.resolve(__dirname, 'dist'),
        library: 'lensing',
        libraryTarget: 'umd',
        umdNamedDefine: true
    },
    module: {
        rules: [
            {
                test: /\.m?js$/,
                exclude: /(node_modules|bower_components)/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/preset-env'],
                        plugins: [
                            '@babel/plugin-proposal-class-properties'
                        ]
                    }
                }
            },
            {
                test: /\.js$/,
                enforce: 'pre',
                use: ['source-map-loader'],
            },
            {
                test: /\.(png|jpg|gif|svg)$/i,
                use: [
                    {
                        loader: 'url-loader',
                        options: {
                            limit: 8192,
                        },
                    },
                ],
            }
        ]
    },
    stats: {
        warningsFilter: [/Failed to parse source map/],
    },
};