Question

我想只删除我按下的特定.delete的行。我怎样才能在jQuery中指定它。现在它删除了所有的p，因为我选择了它作为值，但我无法弄清楚如何使其特定于每个追加行。

HTML

<div id="menu">
    <h3>Shopping list</h3>
    <div class="line">
        <p class="title">Amount</p>
        <p class="title">Product</p>
        <p class="title">Price</p>
        <div>
            <input class='amountInput' type='number' name='quantity' min='0' max='1000' step='1'>
            <input class='productInput' type="text" name="message" value="">
            <input class='priceInput' type='number' name='quantity' min='0' max='1000000' step='0.01'>
            <button class="food">Add</button>
        </div>
        <div class="messages">
        </div>
    </div>
</div>
<div class="totalPrice">
</div>

jQuery

$(document).ready(function() {

var totalPrice = 0;

$('.food').click(function() {
    var $frm = $(this).parent();
    var toAdd = $frm.children(".productInput").val();
    var addPrice = $frm.children(".priceInput").val();
    var addAmount = $frm.children(".amountInput").val();


    var div = $("<div>");
    div.append("<p>" + addAmount + "</p>", "<p id='product'> " + toAdd + " </p>", "<p>" + addPrice + "</p>", "<p class='delete'>" + "X" + "</p>");

    $frm.parent().children(".messages").append(div);

    totalPrice += addAmount * addPrice;

    $(".totalPrice").text("Total Price: $" + totalPrice);

});


});




 $(document).on('click', '.delete', function() {
    $('p').remove()


 });

Answer 1

如果要删除正在添加的元素，您只需要在函数中使用$(this)来引用触发调用的元素：

// When an element with the delete class is clicked
$(document).on('click', '.delete', function() {
    // Remove the closest <div> above the element that was clicked
    $(this).closest('div').remove();
});

如果您想更新定价......

当您删除元素时，您可能还需要考虑更新定价，您可以通过阅读最后一个元素并减去它来执行此操作：

$(document).on('click', '.delete', function() {
    // Get the previous element which contains your price
    var priceToSubtract = parseInt($(this).prev().text());
    // Subtract the price
    totalPrice -= priceToSubtract;
    // Update your price
    $(".totalPrice").text("Total Price: $" + totalPrice);
    $(this).closest('div').remove();
});

这将要求您将totalPrice变量放在$(document).ready()块之外，如下所示：

<script>
    var totalPrice = 0;
    $(document).ready(function() {
         // Your code here
    });
</script>

Answer 2

您应该删除所有p的父div，例如：

// This is delegated event as the HTML element is added dynamically 
$(document).on('click', '.delete', function() {
    $(this).closest("div").remove(); // .closest will traverse upwards to find the matched element that is div
});

注意：您需要使用事件委派，因为HTML元素是动态添加的。详细了解here。

单击时删除其中一个添加的行

2 个答案: