exports loader module for webpack

 This module exports variables from inside the file by appending
 'exports[...] = ...' statements.
 .
 Webpack takes code targeted at node.js and makes it run in the browser.
 Node.js comes with API of its own that is not available in the browsers.
 Webpack exposes this code to programs that are unaware they are running in a
 browser.
 .
 Node.js is an event-based server-side JavaScript engine.