Example - file.js

In this example we have a file called file.js.

Let’s assume that you have to parse an URL using JavaScript and NodeJS querystring module.

To accomplish this all you have to do is to insert the following statement in your file:

const querystring = require('querystring'); 
var ref = querystring.parse("foo=bar&abc=xyz&abc=123");

What is this snippet doing?

Well, first, we create a querystring module which provides utilities for parsing and formatting URL query strings. It can be accessed using:

const querystring = require('querystring'); 

Then, we parse a URL using the .parse() method. It parses a URL query string (str) into a collection of key and value pairs.

For example, the query string 'foo=bar&abc=xyz&abc=123' is parsed into:

{  foo: 'bar',  abc: ['xyz', '123']   }

Unfortunately, Browsers don’t have the require method defined, but Node.js does.

Install Browserfy

With Browserify you can write code that uses require in the same way that you would use it in Node. So, how do you solve this? It’s simple.

1. First install node, which ships with npm. Then do:

npm install -g browserify

2. Change into the directory in which your file.js is and Install our querystring module with npm:

npm install querystring

Note: If you don’t change in the specific directory the command will fail because it can’t find the file which contains the module. 3. Now recursively bundle up all the required modules starting at file.js into a single file called bundle.js (or whatever you like to name it) with the browserify command:

browserify file.js -o bundle.js

Browserify parses the Abstract Syntax Tree for require() calls to traverse the entire dependency graph of your

4. FinallyDrop a single