Hey Gunnar,
Der Unterschied liegt wohl in CSS 2.1 vs. CSS 3 begründet:
“The :focus pseudo-class applies while an element has the focus (accepts keyboard events or other forms of text input).” [CSS21 §5.11.3]
“The :focus pseudo-class applies while an element has the focus (accepts keyboard or mouse events, or other forms of input).” [CSS3-SELECTORS §6.6.1.2]
danke für den Hinweis. War mir so gar nicht bewusst.
Gruß, Dennis