JSFiddle - React, Tailwind, and code Playground

by Faisal Pathan

HTML

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

Allow only numbers and comma

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

JavaScript

$("#txtnumber").keyup(function(event) {
  if(event.keyCode != 8){
        var allowChr = ["1","2","3","4","5","6","7","8","9","0",","];
        var val = $('#txtnumber').val().slice(-1);
        if(allowChr.indexOf(val) >= 0){
        
        }else{
   document.getElementById('txtnumber').value = '';
       //$('#txtnumber').val($('#txtnumber').val().slice(0,-1));
        }
        }
});