example of require

import-to.js

const lib = require('./node-module');

const newPizza = new lib.Pizza();

// or

const { Pizza, Lazagna, constant } = require('./node-module');

const newPizza = new Pizza();

node-module.js

class Pizza {}

class Lazagna {}

module.exports = {
    Pizza, // or whatever you want to assign it to
    Lazagna, // again, set it to what you like
    constant: 5 // an example of a static thing
};