perbaikan 004

<head>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
</head>
<body>
<form name="atur_harga" action="" method="POST">
 <label for="desimal">Input Desimal :</label>
 <input type="text" class="harga" id="desimal" value="">
</form>

<script type="text/javascript">
$(document).click(function() {

  $(".harga").on("keyup", function() {
    var valid = /^\d{0,15}(\.\d{0,2})?$/.test(this.value),
      val = this.value;

    if (!valid) {
      console.log("Invalid input!");
      this.value = val.substring(0, val.length - 1);
    }
  });

});

</script>

</body>