insertAfter基于ID的特定元素 [英] insertAfter specific element based on ID

问题描述

我有两个链接列表。我有它，当用户点击任一列表上的链接时，它将被移动到另一个列表。很快这些列表变得无组织，所以我想用ID来组织它们。

I have two lists of links. I have it such that when a user clicks on a link on either list, it is moved to the other list. Very quickly the lists become unorganised so I would like to keep them organised by an ID.

我想要的是当用户点击链接时，它会在 data-id 的最后一个元素的列表小于单击的链接。之后我会插入元素。

What I want then is when a user clicks the link, it will search in the list for the last element whose data-id is less than the link that was clicked. I would then insert the element after that.

现在，我真正感兴趣的是使用jQuery实现这一点的最有效（代码方式）方式。我知道我可以使用 $（。added）。each（）来做到这一点，但它看起来非常笨重。是否有更好的方式使用选择器或其他东西？

Now, what I am really interested in is the most efficient (code wise) way of doing this with jQuery. I understand I can do this using $(".added").each() but it seems very clunky. Is there a better way using selectors or something else?

<div class="available">
    <h2>Available Groups</h2>
    <a href="" data-id="1">Group 1<span>Add</span></a>
    <a href="" data-id="2">Group 2<span>Add</span></a>
    <a href="" data-id="3">Group 3<span>Add</span></a>
    <a href="" data-id="4">Group 4<span>Add</span></a>
    <a href="" data-id="5">Group 5<span>Add</span></a>
</div>

<div class="added">
    <h2>Added Groups</h2>
</div>

当前实施：

$(".available a").on("click",function(){
        var myID = parseInt($(this).data("id"));
        var alist = $(".added a");
        if (alist.length > 0) {
            var nodeToInsertAfter;
            $(".added a").each(function () {
                if (parseInt($(this).data("id")) < myID)
                    nodeToInsertAfter = $(this)
            });

            if (nodeToInsertAfter)
                $(this).insertAfter(nodeToInsertAfter);
            else
                $(this).prependTo(".added");
        }
        else {
            $(this).appendTo(".added");
        }
});

推荐答案

以下是一种方式： jsFiddle示例

Here's one way: jsFiddle example

$(".available a").on("click", function(e) {
    e.preventDefault();
    $('.added h2').after($(this));
    var items = $('.added a').get();
    items.sort(function(a, b) {
        var A = $(a).data('id');
        var B = $(b).data('id');
        if (A < B) return -1;
        if (A > B) return 1;
        return 0;
    });
    $('.added h2').after(items);
});​

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