Forum - Einbau von JavaScript

<script>
  document.getElementsByClassName("mobil").style.backgroundColor = "#FF0000";
</script>
 

<script src="https://code.jquery.com/jquery-3.7.1.js"></script>
<script>
$('.mobil').css('background-color','#FF0000');
</script>
 

<script src="https://code.jquery.com/ui/1.14.0/jquery-ui.js"></script>
<script>
  $('.mobil').attr('title','Hallo');
</script>
 

<script src="https:// ... /Bootstrap/js/bootstrap.min.js"></script>
<div class="mobil bg-danger text-white">Gefahr</div>