How Hooks Wire Up and are Caled in Step Definitions for Cucumber.js

I've attempted to create a before hook in Cucumber.js; this is my first time trying this via Cucumber.js.

Question: I'm wondering how Cucumber knows of the hook in my step definition. And does it automatically call that code for me after requiring it in my world.js?

I mean below I added the var hooks = require('./beforeHooks.js'); in my world.js; I'm wondering if Cucumber.js looks for a certain directory called hooks or do you have to call or use code you defined in your world.js such as the hooks I brought in through my require?

Example (I do not know if this is 100% correct yet):

support/beforeHooks.js

"use strict";

var phantom = require('phantom');

var beforeHooks = function () {
    this.Before(function(scenario, callback) {

        console.log(scenario.getName(), "(" + scenario.getUri() + ":" + scenario.getLine() + ")");

        phantom.create("--web-security=no", "--ignore-ssl-errors=yes", { port: 3000 }, function (ph) {
            var phantomProcess = ph;

            this.createBrowserPage = function(){
                phantomProcess.createPage(function(page) {

                    this.headlessPage = page;
                });
            };
        });
        callback();
    });
};

module.exports = beforeHooks;

support/world.js

"use strict";

var hooks = require('./beforeHooks.js');

var World = function World(callback) {

    callback();
};

module.exports.World = World;

support/viewCustomerList.js - my step definitions

"use strict";

var viewCustomerList = function() {

    this.World = require("../../support/world.js").World;

    var page = this.headlessPage;

    this.Given(/^I visit the customers display page$/, function (callback) {
        page.open("/", function(status){
            status.should.equal("success");
            callback();
        });
    });
};

module.exports = viewCustomerList;