Non-selectable default text for dropdown elements in HTML.
Input fields like the normal input field in HTML have the possibility to define a placeholder. The list or select element does not have this possibility directly. However, it can be easily realised:
<label>list <select> <option value="" disabled selected>Please select</option> <option value="value 1">value 1</option> </select> </label>
The first element is disabled and thus cannot be selected by the user.