[j0hnik]

<style>
  .new-class{
    background-color: red;
  }
</style>
<button class="area">but</button>
<div class="class">tar</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>

$('.area').on('mousedown', function(e) { 
     setTimeout(()=>$(".class").addClass( "new-class" ), 2000);
}).on('mouseup', function(e) { 
  setTimeout(()=>$(".class").removeClass( "new-class" ), 2000);
});

</script>