jQuery Nestable Example

HTML

<script src="https://cdn.rawgit.com/dbushell/Nestable/master/jquery.nestable.js"></script>
<div class="dd">
    <ol class="dd-list">
        <li class="dd-item" data-id="1">
            <div class="dd-handle">Item 1</div>
        </li>
        <li class="dd-item" data-id="2">
            <div class="dd-handle">Item 2</div>
        </li>
        <li class="dd-item" data-id="3">
            <div class="dd-handle">Item 3</div>
            <ol class="dd-list">
                <li class="dd-item" data-id="4">
                    <div class="dd-handle">Item 4</div>
                </li>
                <li class="dd-item" data-id="5">
                    <div class="dd-handle">Item 5</div>
                </li>
            </ol>
        </li>
    </ol>
</div>

CSS

/**
 * Nestable
 */

.dd { position: relative; display: block; margin: 0; padding: 0; max-width: 600px; list-style: none; font-size: 13px; line-height: 20px; }

.dd-list { display: block; position: relative; margin: 0; padding: 0; list-style: none; }
.dd-list .dd-list { padding-left: 30px; }
.dd-collapsed .dd-list { display: none; }

.dd-item,
.dd-empty,
.dd-placeholder { display: block; position: relative; margin: 0; padding: 0; min-height: 20px; font-size: 13px; line-height: 20px; }

.dd-handle { display: block; height: 30px; margin: 5px 0; padding: 5px 10px; color: #333; text-decoration: none; font-weight: bold; border: 1px solid #ccc;
    background: #fafafa;
    background: -webkit-linear-gradient(top, #fafafa 0%, #eee 100%);
    background:    -moz-linear-gradient(top, #fafafa 0%, #eee 100%);
    background:         linear-gradient(top, #fafafa 0%, #eee 100%);
    -webkit-border-radius: 3px;
            border-radius: 3px;
    box-sizing: border-box; -moz-box-sizing: border-box;
}
.dd-handle:hover { color: #2ea8e5; background: #fff; }

.dd-item > button { display: block; position: relative; cursor: pointer; float: left; width: 25px; height: 20px; margin: 5px 0; padding: 0; text-indent: 100%; white-space: nowrap; overflow: hidden; border: 0; background: transparent; font-size: 12px; line-height: 1; text-align: center; font-weight: bold; }
.dd-item > button:before { content: '+'; display: block; position: absolute; width: 100%; text-align: center; text-indent: 0; }
.dd-item > button[data-action="collapse"]:before { content: '-'; }

.dd-placeholder,
.dd-empty { margin: 5px 0; padding: 0; min-height: 30px; background: #f2fbff; border: 1px dashed #b6bcbf; box-sizing: border-box; -moz-box-sizing: border-box; }
.dd-empty { border: 1px dashed #bbb; min-height: 100px; background-color: #e5e5e5;
    background-image: -webkit-linear-gradient(45deg, #fff 25%, transparent 25%, transparent 75%, #fff 75%, #fff),
                      -webkit-linear-gradient(45deg, #fff...

JavaScript

$('.dd').nestable({
            group: 1,
            maxDepth: 1
        });