This repository has 3 branches:

master - empty

ES5 - Files demonstrating ES5 Syntax for defining objects in a module, Inheritance, and explaining prototypes

ES6 - Files demonstrating ES6 Syntax for defining objects in a module, Inheritance, and explaining class notation in JS

to checkout branches:

git checkout NAME_OF_BRANCH

EXAMPLE: git checkout ES5

Will pull out the branches on the ES5 branch. You can switch back and forth without losing the data.