JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="txtNumber">

CSS

.Error
{
color:red
}

JavaScript

$('#txtNumber').keyup(function() {
    $('#lblIntegerError').remove();
    if (isNaN($('#txtNumber').val())) {
        if (isNaN($('#txtNumber').val() <= 0)) {
              $('#txtNumber').after('<label class="Error"  id="lblIntegerError"><br/>Value must be non negative number and greater than zero.</label>');
            return false;
        }
        else
        {
          $('#txtNumber').after('<label class="Error"  id="lblIntegerError"><br/>Value must be integer value.</label>');
            return false;
        }
    }
});