如何计算删除时的元素，这样我最终得不到空（）？ [英] How to count the elements on deletion so I not end up with an empty ()?

问题描述

我有以下代码：

<ul class="ul" id="selected_conditions">
  <li data-field="asset_locations_name" data-condition="in">
    <i class="fa fa-minus-circle delete_condition" aria-hidden="true" title="Click to remove this condition from the list"></i> WHERE asset_locations_name IN(
    <span class="condition_item" data-id="1213381233">
    <i class="fa fa-minus-circle delete" title="Click to remove this item from the list" aria-hidden="true"></i> 1213381233
    </span>,
    <span class="condition_item" data-id="1212371897">
    <i class="fa fa-minus-circle delete" title="Click to remove this item from the list" aria-hidden="true"></i> 1212371897
    </span> )
  </li>
</ul>

每次点击小图标 .delete 我应该删除当前值，我可以使用以下代码实现：

Each time I click on the little icon .delete I should remove the current value and I was able to achieve that with the following code:

$(function() {
  $('#selected_conditions').on('click', '.delete', function(ev) {
    var item_id = $(this).parent().data('id');
    $('.condition_item[data-id="'+ item_id +'"]').remove();
  });
});

但上面的代码有问题：如果我删除所有项目，我将以下列结果（）空字符串，我不能这样：

But the code above has a problems: if I remove all the items I will end up with the following () empty string and I can't have it so:

• 怎么做我在括号（）中计算SPAN，如果点击最后一个，我会发一个警告？

• How do I count the SPAN inside the parenthesis () and trow an alert if I am clicking on the last one?

注意：正确的行为是向用户显示一个确认对话框
和if用户单击确定并同意删除最后一项，然后应删除
整个条件。这意味着如果我点击最后一个元素>应该删除整个父 li 。

有任何帮助吗？我已经给你留下了小提琴。这是一个WIP，所以如果你有一个建议或更好的解决方案随时可以添加到你的答案。

Any help? I have leave you a Fiddle to play with. This is a WIP so if you have a suggestion or better solution feel free to add it to your answer.

推荐答案

我是升级你的jsfiddle例子，请检查它

I've upgrading your jsfiddle example, please check it

$(function() {
    $('#selected_conditions').on('click', '.delete', function(ev) {
        var item = $(this).closest(".condition_item");
        var condition = $(this).closest(".condition");
        var items = condition.find(".condition_item");
        if(items.size() > 1) {
            item.remove();
        } else {
            if(confirm("Removing last item will remove whole condition. Continue?")) {
                condition.remove();
            }
        }
    });
});

https://jsfiddle.net/br3t/8184ok2e/8/

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