在我的updateCartTotal()函数中,我想要console.log从我的购物车中删除的元素。每次按下删除按钮时,我都希望它打印出item, 和price。但是,每当我这样做时,它都会返回未定义。在某些情况下,它只能识别 1 个项目。我不认为我的 JavaScript 代码有问题,而可能是我的 HTMLconst updateCartTotal = () => { var cartItemContainer = document.getElementsByClassName('cart-items')[0] var cartRows = cartItemContainer.getElementsByClassName('cart-row') for(var i = 0; i < cartRows.length; i++){ var cartRow = cartRows[i]; var itemElement= cartRow.getElementsByClassName('cart-item')[0].innerHTML var priceElement = cartRow.getElementsByClassName('cart-price')[0].innerHTML var quantityElement = cartRow.getElementsByClassName('cart-quantity-input')[0] var item = itemElement.innerText var price = priceElement.innerText // var quantity = quantityElement.value console.log(item, price) }}<section class="container shopping-cart"> <div class="title">Cart</div> <div class="cart-row"> <span class="cart-item cart-header cart-column">ITEM</span> <span class="cart-price cart-header cart-column">PRICE</span> <span class="cart-quantity cart-header cart-column">QUANTITY</span> </div> <div class="cart-items"> <div class="cart-row"> <div class="cart-item"> <span class="cart-item-title">Item 1</span> </div> <span class="cart-price ">$14.99</span> <div class="cart-quantity-input"> <input type="number" value="1"> <button class="btn btn-danger ml-5" type="button">REMOVE</button> </div> </div> <div class="cart-row"> <div class="cart-item"> <span class="cart-item-title ">Item 2</span> </div> <span class="cart-price">$79.99</span> <div class="cart-quantity-input"> <input type="number" value="2"> <button class="btn btn-danger ml-5" type="button">REMOVE</button> </div> </div> </div></section>
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