JavaScript IIFE & function pxpression / function declarations

https://www.sitepoint.com/demystifying-javascript-closures-callbacks-iifes/

http://stackoverflow.com/questions/20267957/how-do-i-debug-a-callback-function-used-in-a-jquery-bind-call-with-chrome-devt

http://stackoverflow.com/questions/11788081/chrome-javascript-debugger-breakpoints-dont-do-anything

http://kangax.github.io/nfe/