如何使用JQuery在可拖动对象和可拖放对象之后插入和追加？

Question

我正在尝试构建Bootstrap编辑器。我有一个假定的Bootstrap类或工具的<li>菜单，无论如何。 <li>添加一个新部分与<li>添加一些工具之间是有区别的。在我后面添加插入部分，并在我添加后面添加工具。这里的部分是“当前”或“新”。

JQuery

<script>
    $(function () {

        $(".draggable").draggable({
            helper: "clone",
            end: function (e, ui) {
                const Holded_ItemID = ui.draggable.attr("id");
                if (Holded_ItemID == 'Sec') {
                    $("li").removeClass("NewSection"); 
                    $(ui.helper).addClass("NewSection");
                }
            }
        });

        $("#droppable").droppable({
            drop: function (e, ui) {
                const Holded_ItemID = ui.draggable.attr("id");
                if (Holded_ItemID == 'Sec') {
                //to insert new section after current section
                $(this).children().last().insertAfter($(ui.draggable).clone());
                }
                else
                {
                //to add elemnt inside the new section
                    $('.NewSection').append($(ui.draggable).clone());
                };
            }
        });
    });
</script>

HTML

    <ul>
        <li id="Sec" class="draggable">add new section</li>
        <li class="draggable ui-widget-content">add new grid</li>
        <li class="draggable ui-widget-content">add new button</li>
        <li class="draggable ui-widget-content">add new Image</li>
        <li class="draggable ui-widget-content">add new card</li>
        <li class="draggable ui-widget-content">add new media objects</li>
    </ul>

    <div class="droppable ui-widget-header">
      <p>Area Of web design</p>
    </div>

CSS

  <style>
  .draggable { width: 170px; height: 20px; border:1px dotted black; padding: 1px 1px 1px 10px; margin:3px; }
  .droppable { width: 500px; height: 300px; padding: 0.5em; float: left; margin: 10px; padding:10px; background-color:antiquewhite; }
  </style>

简而言之，我无法从li菜单中添加任何内容到可放置区域。为什么，我的代码有什么问题？

Answer 1

一些注意事项：

• 对于draggable({})，您必须使用stop()事件而不是end。
• 我使用ui.helper访问所拖动的元素。
• 而不是$(this).children().last().insertAfter我只使用了追加，不确定为什么要使用它，因此您可能想根据需要修改我的更改。

我认为这就是您想要的，

$(function () {
  $(".draggable").draggable({
    helper: "clone",
    stop: function (e, ui) {
      //console.log(ui.helper[0]);
      const Holded_ItemID = $(ui.helper[0]).attr("id");
      if (Holded_ItemID == 'Sec') {
        $("li").removeClass("NewSection"); 
        $(ui.helper[0]).addClass("NewSection");
      }
    }
  });

  $("#droppable").droppable({
    drop: function (e, ui) {
      const Holded_ItemID = $(ui.draggable[0]).attr("id");
      if (Holded_ItemID == 'Sec') {
      //to insert new section after current section
        $("#droppable").append(ui.draggable[0])
        //$(this).children().last().insertAfter($(ui.draggable).clone());
      } else {
        //to add elemnt inside the new section
        $("#droppable").append($(ui.draggable[0]).clone());
      };
    }
  });
});

.draggable { width: 170px; height: 20px; border:1px dotted black; padding: 1px 1px 1px 10px; margin:3px; }
.droppable { width: 500px; height: 300px; padding: 0.5em; float: left; margin: 10px; padding:10px; background-color:antiquewhite; }

<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<ul>
    <li id="Sec" class="draggable">add new section</li>
    <li class="draggable ui-widget-content">add new grid</li>
    <li class="draggable ui-widget-content">add new button</li>
    <li class="draggable ui-widget-content">add new Image</li>
    <li class="draggable ui-widget-content">add new card</li>
    <li class="draggable ui-widget-content">add new media objects</li>
</ul>

<div id="droppable" class="droppable ui-widget-header">
  <p>Area Of web design</p>
</div>