refactor

by Dmitry Morar

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" class="cat" value="1">

<div id="dima">
  <button class="plus">+</button>
  <button class="minus">-</button>
</div>

JavaScript

let inputAmount = $('.cat');

$(".plus").click(function() { 
  let quantity = parseInt(inputAmount.val(), 10);
  inputAmount.val(quantity + 1);
});

$(".minus").click(function() {
  let quantity = parseInt(inputAmount.val(), 10);
  inputAmount.val(quantity - 1);
});