jQuery toggleClass example

Toggle class name on click in jQuery

by Rodwyn Moreno

HTML

<div id="banner-message">
  <input type="text" class="only-numeric" />
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}

button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}

#banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}

#banner-message.alt button {
  background: #fff;
  color: #000;
}

JavaScript

$(".only-numeric").on('keydown', function (e) {
  /* Allowed keys
  	Digit:0 to 9 (48 to 57 and 96 to 105)
    Backspace : (8)
    tab:(9)
  */
  var key_codes = [9, 8, 46];
  console.log('code:', e.which);
  console.log('inArray', $.inArray(e.which, key_codes));
  /*if ($.inArray(e.which, key_codes)) {
  	console.log('soy una letra');
  }*/
  
  if (
  	($.inArray(e.which, key_codes) < 0) && 
    !(e.which >= 48 && e.which <= 57) && 
    !(e.which >= 96 && e.which <= 105)) {
      e.preventDefault();
    }
});