Module Pattern in Javascript

http://stackoverflow.com/questions/17776940/javascript-module-pattern-with-example

https://coryrylan.com/blog/javascript-module-pattern-basics

http://www.adequatelygood.com/JavaScript-Module-Pattern-In-Depth.html

https://toddmotto.com/mastering-the-module-pattern/

Singleton Pattern in Javascript:

https://addyosmani.com/resources/essentialjsdesignpatterns/book/