I had a very weird result as to how the navbar layout played out in codepen compared to simply my broswer off of a html file.
The problem in codepen persisted after I boiled down the steps to reproduce to these steps:
Start a new pen
Include boostrap.css, jquery.js and boostrap.js as per the instructions in this video (https://www.youtube.com/watch?v=hiCK6-8XfiA)
paste navbar code from boostrap
Im doing this is Chrome and cleared browser cache
Firefox and Safari gave me same results
Is it codepen or is it me?