JavaScript计算元素的总价

Question

请帮我输入所选商品的总价。 这是 JSFiddle

 <section id="items">
   <div class="item">Monitor <span class="price">100$</span></div>
   <div class="item">Mouse <span class="price">20$</span></div>
   <div class="item">Keyboard <span class="price">60$</span></div>
 </section>
 <section id="basket">
   <p>Total price:<span class="total_price"></span></p>
 </section>`

Answer 1

此代码将动态运行。即使您添加或删除项目，它也应该有效。

var priceList = $('#items').find('.price');

var totalPrice = 0;

$.each(priceList, function(i, price){
  
totalPrice += parseInt($(price).text())
  
  });

$('.total_price').text(totalPrice);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<section id="items">
    <div class="item">Monitor <span class="price">100$</span></div>
    <div class="item">Mouse <span class="price">20$</span></div>
    <div class="item">Keyboard <span class="price">60$</span></div>
</section>
<section id="basket">
    <p>Total price:<span class="total_price"></span></p>
</section>