• npm install -g webpack && npm install
• webpack
• node build/index.js

Take a quick look at index.js and exportsObject.js to get a sense of the structure of the app

Then in the REPL:

• exportsObject.a exportsObject is a var in index.js
• ns exportsObject switch to the exportsObject "namespace"
• this.a = 99 this WILL change the value of exportsObject.a
• ns to go back to the main namespace
• exportsObject.a = 99. Success!