Using :focus to style outer div?

Question

When I begin writing text in the textarea, I want the outer div, with a class box, to have it\'s border turned solid instead of dashed, but somehow the :focus doesn\'t apply

Answer 1

As per the spec:

The :focus pseudo-class applies while an element has the focus (accepts keyboard events or other forms of text input).

The

does not accept input, so it cannot have :focus. Furthermore, CSS does not allow you to set styles on an element based on targeting its descendants. So you can't really do this unless you are willing to use JavaScript.

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