JSFiddle - React, Tailwind, and code Playground

HTML

<div>text</div>
<input type="password" id="new_password" maxlength="6" />
<p></p>

JavaScript

var counter = 0;



$('#new_password').on('keypress', function(e) {
  $('div').text('key pressed ' + ++counter + ' which: ' + e.which + ' keyCode: ' + e.keyCode);
  var charCode = e.keyCode;
  //e.preventDefault();
  //e.stopPropagation();
  //e.stopImmediatePropagation();
  //return false;
  if (charCode > 31 && (charCode < 48 || charCode > 57)) {
    alert('Only numbers are allowed.');
    return false;
  }
});