The :nth-last-of-type() selector selects all elements that are the nth child of a specified type of their parent, counting from the last child.

What this means is that the counting of the child elements DOES take into account the type of element. If the last child was an img, the second from last an h2, and then the p. The paragraph is the third from last child, BUT it’s also the last of type (the first p tag) from the last child. A second p tag coming before the first, would be the p:nth-last-of-type(2). In other words, we’re only counting the types specified, starting from the last child of the parent.

So in the example below, we are looking for each second from last paragraph of the parent and selecting it.

// selects every HTML paragraph that is also the second paragraph from the last child of its parent
$('p:nth-last-of-type(2)')

Parameter	Description
n	The index of each child to match; must be a number and first element will have the index number 1 not zero)
even	Selects each even child element
odd	Selects each odd child element
formula	Specifies which child element(s) to be selected with a formula (an + b - example: p:nth-child(3n+2) selects each 3rd paragraph, starting at the 2nd child element)

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To select multiple HTML elements with varying ids and classes, separate them with commas. The following will select 4 different elements based on their ID, class, or tag.

$('#intro, #footer, .my_paragraphs, h3')

To be more specific when selecting an HTML element, you can refer to the element and an ancestor element.

// all .child elements that live within a .father element
$('.father .child')

// all h1 tags that live within a .father element
$('.father h1')

Notice that there is no comma between the classes (but there is a space), which says you are targeting the class .child and it must have an ancestor with the class .father, as shown in the first example. You can include as many ancestors as necessary to be as specific as necessary.

// all p tags that live within a .child element that lives within a .father element
$('.father .child p')

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