Restrict (Prevent) user to input in TextBox using JavaScript and jQuery in ASP.Net

i am trying to intergrate javascript with textbox, but it is not working

i want that textbox do not take input from keyboard or (Copy/Paste), just allowed from  barcode scanner device to take input 

<script type="text/javascript">
    let inputStart, inputStop;
    $("#scanInput")[0].onpaste = e => e.preventDefault();
    // handle a key value being entered by either keyboard or scanner
    var lastInput

    let checkValidity = () => {
	if ($("#scanInput").val().length < 10) {
  	  $("#scanInput").val('')
        } else {
            $("body").append($('<div style="background:green;padding: 5px 12px;margin-bottom:10px;" id="msg">ok</div>'))
        }
        timeout = false
    }

    let timeout = false
    $("#scanInput").keypress(function (e) {
        if (performance.now() - lastInput > 1000) {
  	    $("#scanInput").val('')
        }
	lastInput = performance.now();
	if (!timeout) {
  	    timeout = setTimeout(checkValidity, 200)
        }
    });
</script>

<asp:TextBox ID="scanInput" AutoPostBack="true" runat="server"  Placeholder="Input Bale No" autocomplete="off"  Height="30px" Width="208px" style="margin-left: 0px"></asp:TextBox>