购物车总价格和数量

Question

Below there's a shopping cart that when you remove the product it works and price gets updated, but when I try to add more quantity like 2 or 3 then Total Price doesn't get updated, but when I remove the product it gets updated and that's where's the problem that I don't know how to solve it. 下面有一个购物车，当你删除产品时，它工作，价格得到更新，但当我尝试添加更多的数量，如2或3，然后总价格不会更新，但当我删除产品，它得到更新，这是哪里是我不知道如何解决它的问题。 Also I have added an function with quantity so the minimum of order could be only 1 and if you try to add less than 1 like 0 or -1,-2 it will be changed automatically at number 1, but doesn't work and I need some help. 此外，我添加了一个数量函数，所以最小的顺序可能只有1，如果你尝试添加少于1，如0或-1，-2它将自动更改为1号，但不起作用，我需要一些帮助。

ps: This is only an exercise so there's no PHP or something else. ps：这只是一个练习，所以没有PHP或其他东西。

<div class="click-cart">
        <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="olp">
            <div class="lakn">
            <img class="shop-item-cart" src="https://www.gettyimages.ca/gi-resources/images/Homepage/Hero/UK/CMS_Creative_164657191_Kingfisher.jpg">
            <span class="shop-title">Product 1</span>
            <span class="shop-price">$19.99</span>
            <input class="quantity-input" type="number" value="1">
            <button class="delete-cart">X</button>
          </div></div>
            <div class="clear-checkout">
          <button class="checkout">Checkout</button>
          <button class="clear-cart">Clear Cart</button></div>
          <div class="cart-total">
              <strong class="cart-total-title">Total</strong>
              <span class="cart-total-price">$10.79</span>
          </div>
      </div>```
-------------------------------------------------------------------------
let removeCartItemButtons = document.querySelectorAll('.delete-cart'); 
    for (let i = 0; i < removeCartItemButtons.length; i++) {
    let button = removeCartItemButtons[i]
    button.addEventListener('click', removeCartItem) 
    }

    let quantityInputs = document.querySelector('.quantity-input');
    for (let i = 0; i < quantityInputs.length; i++) {
        let input = quantityInputs[i]
        input.addEventListener('change', quantityChanged);
    }

function removeCartItem (event) {
        let buttonCliked = event.target;
        buttonCliked.parentElement.parentElement.remove()
        updateCartTotal()
    }

    function quantityChanged () {
        let input = event.target
        if (isNaN(input.value) || input.value <= 0) {
        input.value = 1
    }
    updateCartTotal ()
}

function updateCartTotal () {
    let cartItemContainer = document.querySelector('.click-cart');
    let cartRows = cartItemContainer.querySelector('.cart-row');
    let total = 0
    for (let i = 0; i < cartRows.length; i++) {
        let cartRow = cartRows[i]
        let priceElement = cartRow.querySelector('.shop-price');
        let quantityElement = cartRow.querySelectorAll('.quantity-input');
        let price = parseFloat(priceElement.innerText.replace('$', ''))
        let quantity = quantityElement.value
        total = total + (price * quantity)
    }
    total = Math.round(total * 100) / 100
    document.querySelector('.cart-total-price').innerText = '$' + total;
}

Answer 1

    <!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" >
        <div>
            <div class="click-cart">
                <div class="cart-row2">
                    <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-row">
                    <div class="lakn">
                        <img class="shop-item-cart" src="https://www.gettyimages.ca/gi-resources/images/Homepage/Hero/UK/CMS_Creative_164657191_Kingfisher.jpg">
                        <span class="shop-title">Product 1</span>
                        <span class="shop-price">$19.99</span>
                        <input class="quantity-input" type="number" value="1" />
                        <button class="delete-cart">X</button>
                    </div>
                </div>
                <div class="clear-checkout">
                    <button class="checkout">Checkout</button>
                    <button class="clear-cart">Clear Cart</button>
                </div>
                <div class="cart-total">
                    <strong class="cart-total-title">Total</strong>
                    <span class="cart-total-price">$10.79</span>
                </div>
            </div>
        </div>
    </form>
    <script>
        let removeCartItemButtons = document.querySelectorAll('.delete-cart');
        for (let i = 0; i < removeCartItemButtons.length; i++) {

            let button = removeCartItemButtons[i]
            button.addEventListener('click', removeCartItem)
        }

        let quantityInputs = document.querySelectorAll('.quantity-input');
        for (let i = 0; i < quantityInputs.length; i++) {

            let input = quantityInputs[i]
            input.addEventListener('change', quantityChanged);
        }

        function removeCartItem(event) {
            let buttonCliked = event.target;
            buttonCliked.parentElement.parentElement.remove()
            updateCartTotal()
        }

        function quantityChanged() {

            let input = event.target;
            if (isNaN(input.value) || input.value <= 0) {
                input.value = 1;
            }
            updateCartTotal()
        }

        function updateCartTotal() {
            let cartItemContainer = document.querySelector('.click-cart');
            let cartRows = cartItemContainer.querySelectorAll('.cart-row');

            let total = 0
            for (let i = 0; i < cartRows.length; i++) {
                let cartRow = cartRows[i]
                let priceElement = cartRow.querySelector('.shop-price');
                let quantityElement = cartRow.querySelector('.quantity-input');

                let price = parseFloat(priceElement.innerText.replace('$', ''))
                let quantity = quantityElement.value
                total = total + (price * quantity)
            }
            total = Math.round(total * 100) / 100
            document.querySelector('.cart-total-price').innerText = '$' + total;
        }
    </script>
</body>
</html>

购物车总价格和数量

问题描述

ps: This is only an exercise so there's no PHP or something else. ps：这只是一个练习，所以没有PHP或其他东西。

1 个解决方案

解决方案1
0 2019-03-24 23:14:04

购物车总价格和数量

问题描述

ps: This is only an exercise so there's no PHP or something else. ps：这只是一个练习，所以没有PHP或其他东西。

1 个解决方案

解决方案1 0 2019-03-24 23:14:04

解决方案1
0 2019-03-24 23:14:04