Bitta elementga ham id, ham class tayinlanishi mumkin. Bunday holda, element stillarining bir qismi id orqali, stillarning bir qismi esa class orqali o'rnatilishi mumkin.
<div id="block" class="large">
<p>text</p>
<p>text</p>
</div>
#block {
color: red;
font-family: Arial;
}
.large {
font-size: 30px;
}