Limit text input to numeric values

limitToNumber.js

textInput.addEventListener('keydown', function (e) {
  if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1 ||
    (e.keyCode == 65 && e.ctrlKey === true) || // Allow: Ctrl+A
    (e.keyCode == 67 && e.ctrlKey === true) || // Allow: Ctrl+C
    (e.keyCode == 88 && e.ctrlKey === true) || // Allow: Ctrl+X
    (e.keyCode >= 35 && e.keyCode <= 39)) // Allow: home, end, left, right
  { return; }
  
  // Ensure that it is a number and stop the keypress
  if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
    e.preventDefault();
  }
});