CSS selector for expanded select (dropdown) element -

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how can style drop down different when open or closed? there pseudo selectors or tricks that? of course out javascript.

<select>   <option> op1 </option>   <option> op2 </option> </select>

and :hover doesn't suit need because when drop down expanded, can move cursor away. still open :hover styling doesn't apply anymore.

are looking :hover?

it's state of element if mouse on it.

a {    color: blue;  }  a:hover {    color: red;    text-decoration: overline;  }
<a href="#">move mouse on me</a>


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