CSS: :last-of-type selector is applied to all elements

• Component: CSS
• Status: RESOLVED DUPLICATE

[Niels Leenheer (HTML5test)]

Current behavoir:
The :last-of-type selector matches every element.

Reason:
The reason for this is that every time a new element is added to the DOM, it is checked to see if it matches one of the CSS selectors. Because the DOM is build one element at a time, every element is at least once the last element of a certain type. 

Proper behavoir:
The selector should only match elements that are *really* the last of a certain type. Once an element is no longer the last of a certain type, it should no longer match the :last-of-type selector.

[Nicholas Shanks]

*** This bug has been marked as a duplicate of 5468 ***