jQuery可排序占位符水平div

Question

我正在尝试在jQuery上进行占位符排序。我有这个代码

$('#list').sortable({
    placeholder: "testclass",
    forcePlaceholderSize: true
});
<div id="list">
    <div class="item">First</div>
    <div class="item">Second</div>
    <div class="item">Third</div>
</div>
.item {
    border: 1px solid black;
    padding: 2px 4px;
    display: inline-block;
}
.testclass {
    background-color: red;
    border: 2px solid red;
}

（http://jsfiddle.net/EUVrK/81/）

但似乎效果不佳

Answer 1

尝试制作占位符inline-block

.testclass {
    background-color: red;
    border: 2px solid red;
    width: inherited;
    display: inline-block;
}

演示：Fiddle