Applies one or more styles to the element that is the only sibling element of its type.
A CSS simple selector.
- Selectors Level 3, Section 188.8.131.52
The :only-of-type pseudo-class is a structural pseudo-class. Structural pseudo-classes enable selection based on extra information in the document tree that can't be selected using simple selectors or combinators.
Build date: 11/29/2012