E:only-of-type

Matches an E element, that is the only sibling of its type. (Source: W3C)

HTML:

1. <div>
2. <div>Lorem ipsum dolor sit amet, consectetur</div>
3. <p>Lorem ipsum dolor sit amet, consectetur</p>
4. <div>Lorem ipsum dolor sit amet, consectetur</div>
5. </div>

CSS:

1. p:only-of-type{font-style:italic}

Output:

In the example, the second line of text should be set in italics as it is the only p-element in its parent element.