Apply CSS styling to all but last selected element

To accomplish this first apply the styles to all of the elements in the selection. Laster we will remove the styles from the last element. In my example I am adding text after all links:

a::after {
  content: " | ";

From there we can get the last element in the selection using the last-of-type selector to update the previously applied styles like so:

a:last-of-type::after {
  content: "";

The markup looks like this in the browser: Link One | Link Two | Link Three | Link Four

And you can see the last element did not get the content: " | " applied to it.