require-node-example/example1_simple/node_modules/webpack/buildin/system.js

An example for how to use npm package: require-node & require-node-loader

// Provide a "System" global.
module.exports = {
	// Make sure import is only used as "System.import"
	import: function() {
		throw new Error("System.import cannot be used indirectly");
	}
};