https://eloquentjavascript.net/10_modules.html#i_+pU//gQmZ8

Eloquent JavaScript 1002 Roads module.js

// Add dependencies and exports
(require, exports, module) => {
	const {buildGraph} = require("./graph");

    const roads = [
      "Alice's House-Bob's House",   "Alice's House-Cabin",
      "Alice's House-Post Office",   "Bob's House-Town Hall",
      "Daria's House-Ernie's House", "Daria's House-Town Hall",
      "Ernie's House-Grete's House", "Grete's House-Farm",
      "Grete's House-Shop",          "Marketplace-Farm",
      "Marketplace-Post Office",     "Marketplace-Shop",
      "Marketplace-Town Hall",       "Shop-Town Hall"
    ];

  	exports.roadGraph = buildGraph(roads.map(road => road.split("-")));
};