JSFiddle - React, Tailwind, and code Playground

HTML

<textarea class="text"></textarea>
<label for="">Delay:</label>
<input type="text" class="cdealy" value="500">

<div class="result">

</div>

JavaScript

var $delay = $('.cdelay').val();

$('.text').on('keyup', function() {

  var $this = $(this);

  clearTimeout($this.data('timer'));

  $this.data('timer', setTimeout(function(){
     $('.result').html($this.val());
  }, $delay));	
});



$('.cdealy').on('change', function(){
	$delay = $(this).val();
  console.log('upd');
});