JSFiddle - React, Tailwind, and code Playground

HTML

<head>
    <title>Unbenannte Seite</title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        function setCaretPosition(elemId, caretPos) {
            var elem = document.getElementById(elemId);

            if(elem != null) {
                if(elem.createTextRange) {
                    var range = elem.createTextRange();
                    range.move('character', caretPos);
                    range.select();
                }
                else {
                    if(elem.selectionStart) {
                        elem.focus();
                        elem.setSelectionRange(caretPos, caretPos);
                    }
                    else
                        elem.focus();
                }
            }
        }
      $(document).ready(function(){
        $("#Button1").click(function(e){
            e.preventDefault();
            var d = new Date();
            var curr_date = d.getDate();
            var curr_month = d.getMonth() + 1;
            var curr_year = d.getFullYear();
            var curr_hour = d.getHours();
            var curr_minute = d.getMinutes();
            var name = "Name";
            var wert = curr_date + "." + curr_month + "." + curr_year + " / " + curr_hour + ":" + curr_minute + " / " + name + "\n" + "----------------------------------------" + "\n";
            var len = wert.length();
            wert = wert + "\n" + "----------------------------------------" + "\n" + "\n";
            var input = $("#tbVZusatz");
            input.val(wert + input.val());
            input.val(input.val());
            setCaretPosition("#tbVZusatz",len);
        });
      });

    </script>
</head>
<body>
    <form id="form1">
    <div>
        <textarea ID="tbVZusatz" ></textarea>
        <br />
        <br />
        <input type="submit"  ID="Button1" Text="Stempel" />
    </div>
    </form>
</body>