dependency management - Javascript require() function giving ReferenceError: require is not defined

Basically, I am using javascript to scrape data from Google Play store using:

1-Request

2-Cheerios

3-QueryString

I used Google Market API from Github which uses require as following:

var request   = require('request');
var cheerio   = require('cheerio');
var qs      = require('querystring');

But I am getting the following

ReferenceError: require is not defined ...

So, I don't have require in javascript which is either new for me or this is something out of the ordinary.

Answer

RequireJS is a JavaScript file and module loader. It is optimized for
in-browser use, but it can be used in other JavaScript environments,
like Rhino and Node. Using a modular script loader like RequireJS will
improve the speed and quality of your code.

IE 6+ .......... compatible ✔

Firefox 2+ ..... compatible ✔
Safari 3.2+ .... compatible ✔
Chrome 3+ ...... compatible ✔
Opera 10+ ...... compatible ✔

http://requirejs.org/docs/download.html

Add this to your project: https://requirejs.org/docs/release/2.3.5/minified/require.js

and take a look at this http://requirejs.org/docs/api.html