JQuery Selectors
JQuery uses CSS selectors in order to grab DOM elements. So anything from the examples below is a valid JQuery selector.
$('nav') => Grabs all nav elements
$('nav > li') => Grabs all List items that are direct children of a nav
$('nav > li:last-of-type') => The last list item of a nav
etc.
Any valid css selector can be used inside the $() as a selector.
