Heute habe ich interessane Hinweise bekommen: https://css-tricks.com/almanac/selector ... der-shown/
Der trick sieht etwa so:
Code: Select all
<label for="school">School Name:</label>
<input placeholder="Forest Hills Example High School" type="text" name="school" id="school">
Code: Select all
input:placeholder-shown {
border: 3px solid red;
}