webpack.config.js

const path = require('path');

const webpack = require('webpack');
const HtmlWebPackPlugin = require("html-webpack-plugin");
const CopywebpackPlugin = require('copy-webpack-plugin');

const htmlPlugin = new HtmlWebPackPlugin({
    template: "./src/index.html",
    filename: "./index.html"
});

const cesiumSource = 'node_modules/cesium/Source';
const cesiumWorkers = '../Build/Cesium/Workers';

module.exports = {
    context: __dirname,
    entry: {
    	app: './src/index.js'
    },
    output: {
    	filename: '[name].js',
        path: path.resolve(__dirname, 'dist'),
        sourcePrefix: '',
    },
    amd: {
        // Enable webpack-friendly use of require in Cesium
        toUrlUndefined: true
    },
    node: {
        // Resolve node module use of fs
        fs: 'empty'
    },
    resolve: {
		alias: {
			// Cesium module name
			cesium: path.resolve(__dirname, cesiumSource)
		}
	},
    module: {
        rules: [{
                test: /\.js$/,
                exclude: /node_modules/,
                use: [{
                    loader: 'babel-loader',
                    options: {
                        presets: ['env', 'react']
                    }
                }],
            },
            {
                test: /\.css$/,
                use: [{
                        loader: "style-loader"
                    },
                    {
                        loader: "css-loader",
                        options: {
                            modules: true,
                            importLoaders: 1,
                            localIdentName: "[name]_[local]_[hash:base64]",
                            sourceMap: true,
                            minimize: true
                        }
                    }
                ]
            },
            {
                test: /\.(png|gif|jpg|jpeg|svg|xml|json)$/,
                use: [ 'url-loader' ]
            }
        ],
    },
    plugins: [
        htmlPlugin,
        new CopywebpackPlugin([ { from: path.join(cesiumSource, cesiumWorkers), to: 'Workers' } ]),
        new CopywebpackPlugin([ { from: path.join(cesiumSource, 'Assets'), to: 'Assets' } ]),
        new CopywebpackPlugin([ { from: path.join(cesiumSource, 'Widgets'), to: 'Widgets' } ]),
        new webpack.DefinePlugin({
            // Define relative base path in cesium for loading assets
            CESIUM_BASE_URL: JSON.stringify('')
        }),
    ]
};