jQuery UI可嵌套列表排序特效代码

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以下是 jQuery UI可嵌套列表排序特效代码的示例演示效果:
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HTML代码(index.html):
<!DOCTYPE html>
<!--[if lt IE 7]> <html lang="en" class="lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]>    <html lang="en" class="lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]>    <html lang="en" class="lt-ie9"> <![endif]-->
<!--[if IE 9]>    <html lang="en" class="ie9"> <![endif]-->
<!--[if gt IE 9]><!--> <html lang="en"> <!--<![endif]-->
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
    <title>jQuery UI可嵌套列表排序</title>
    <style type="text/css">

.cf:after { visibility: hidden; display: block; font-size: 0; content: " "; clear: both; height: 0; }
* html .cf { zoom: 1; }
*:first-child+html .cf { zoom: 1; }

html { margin: 0; padding: 0; }
body { font-size: 100%; margin: 0; padding: 1.75em; font-family: 'Helvetica Neue', Arial, sans-serif; }

h1 { font-size: 1.75em; margin: 0 0 0.6em 0; }

a { color: #2996cc; }
a:hover { text-decoration: none; }

p { line-height: 1.5em; }
.small { color: #666; font-size: 0.875em; }
.large { font-size: 1.25em; }

/**
 * 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 25%, transparent 25%, transparent 75%, #fff 75%, #fff);
    background-image:    -moz-linear-gradient(45deg, #fff 25%, transparent 25%, transparent 75%, #fff 75%, #fff), 
                         -moz-linear-gradient(45deg, #fff 25%, transparent 25%, transparent 75%, #fff 75%, #fff);
    background-image:         linear-gradient(45deg, #fff 25%, transparent 25%, transparent 75%, #fff 75%, #fff), 
                              linear-gradient(45deg, #fff 25%, transparent 25%, transparent 75%, #fff 75%, #fff);
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
}

.dd-dragel { position: absolute; pointer-events: none; z-index: 9999; }
.dd-dragel > .dd-item .dd-handle { margin-top: 0; }
.dd-dragel .dd-handle {
    -webkit-box-shadow: 2px 4px 6px 0 rgba(0,0,0,.1);
            box-shadow: 2px 4px 6px 0 rgba(0,0,0,.1);
}

/**
 * Nestable Extras
 */

.nestable-lists { display: block; clear: both; padding: 30px 0; width: 100%; border: 0; border-top: 2px solid #ddd; border-bottom: 2px solid #ddd; }

#nestable-menu { padding: 0; margin: 20px 0; }

#nestable-output,
#nestable2-output { width: 100%; height: 7em; font-size: 0.75em; line-height: 1.333333em; font-family: Consolas, monospace; padding: 5px; box-sizing: border-box; -moz-box-sizing: border-box; }

#nestable2 .dd-handle {
    color: #fff;
    border: 1px solid #999;
    background: #bbb;
    background: -webkit-linear-gradient(top, #bbb 0%, #999 100%);
    background:    -moz-linear-gradient(top, #bbb 0%, #999 100%);
    background:         linear-gradient(top, #bbb 0%, #999 100%);
}
#nestable2 .dd-handle:hover { background: #bbb; }
#nestable2 .dd-item > button:before { color: #fff; }

@media only screen and (min-width: 700px) { 

    .dd { float: left; width: 48%; }
    .dd + .dd { margin-left: 2%; }

}

.dd-hover > .dd-handle { background: #2ea8e5 !important; }

/**
 * Nestable Draggable Handles
 */

.dd3-content { display: block; height: 30px; margin: 5px 0; padding: 5px 10px 5px 40px; 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;
}
.dd3-content:hover { color: #2ea8e5; background: #fff; }

.dd-dragel > .dd3-item > .dd3-content { margin: 0; }

.dd3-item > button { margin-left: 30px; }

.dd3-handle { position: absolute; margin: 0; left: 0; top: 0; cursor: pointer; width: 30px; text-indent: 100%; white-space: nowrap; overflow: hidden;
    border: 1px solid #aaa;
    background: #ddd;
    background: -webkit-linear-gradient(top, #ddd 0%, #bbb 100%);
    background:    -moz-linear-gradient(top, #ddd 0%, #bbb 100%);
    background:         linear-gradient(top, #ddd 0%, #bbb 100%);
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}
.dd3-handle:before { content: '≡'; display: block; position: absolute; left: 0; top: 3px; width: 100%; text-align: center; text-indent: 0; color: #fff; font-size: 20px; font-weight: normal; }
.dd3-handle:hover { background: #ddd; }

    </style>
</head>
<body>

    <h1>Nestable</h1>

    <p>Drag &amp; drop hierarchical list with mouse and touch compatibility (jQuery plugin)</p>

    <menu id="nestable-menu">
        <button type="button" data-action="expand-all">Expand All</button>
        <button type="button" data-action="collapse-all">Collapse All</button>
    </menu>

    <div class="cf nestable-lists">

        <div class="dd" id="nestable">
            <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>
                    <ol class="dd-list">
                        <li class="dd-item" data-id="3"><div class="dd-handle">Item 3</div></li>
                        <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>
                            <ol class="dd-list">
                                <li class="dd-item" data-id="6"><div class="dd-handle">Item 6</div></li>
                                <li class="dd-item" data-id="7"><div class="dd-handle">Item 7</div></li>
                                <li class="dd-item" data-id="8"><div class="dd-handle">Item 8</div></li>
                            </ol>
                        </li>
                        <li class="dd-item" data-id="9"><div class="dd-handle">Item 9</div></li>
                        <li class="dd-item" data-id="10"><div class="dd-handle">Item 10</div></li>
                    </ol>
                </li>
                <li class="dd-item" data-id="11">
                    <div class="dd-handle">Item 11</div>
                </li>
                <li class="dd-item" data-id="12">
                    <div class="dd-handle">Item 12</div>
                </li>
            </ol>
        </div>

        <div class="dd" id="nestable2">
            <ol class="dd-list">
                <li class="dd-item" data-id="13">
                    <div class="dd-handle">Item 13</div>
                </li>
                <li class="dd-item" data-id="14">
                    <div class="dd-handle">Item 14</div>
                </li>
                <li class="dd-item" data-id="15">
                    <div class="dd-handle">Item 15</div>
                    <ol class="dd-list">
                        <li class="dd-item" data-id="16"><div class="dd-handle">Item 16</div></li>
                        <li class="dd-item" data-id="17"><div class="dd-handle">Item 17</div></li>
                        <li class="dd-item" data-id="18"><div class="dd-handle">Item 18</div></li>
                    </ol>
                </li>
            </ol>
        </div>

    </div>

    <p><strong>Serialised Output (per list)</strong></p>

    <textarea id="nestable-output"></textarea>
    <textarea id="nestable2-output"></textarea>

    <p>&nbsp;</p>

    <div class="cf nestable-lists">

    <p><strong>Draggable Handles</strong></p>

    <p>If you're clever with your CSS and markup this can be achieved without any JavaScript changes.</p>

        <div class="dd" id="nestable3">
            <ol class="dd-list">
                <li class="dd-item dd3-item" data-id="13">
                    <div class="dd-handle dd3-handle">Drag</div><div class="dd3-content">Item 13</div>
                </li>
                <li class="dd-item dd3-item" data-id="14">
                    <div class="dd-handle dd3-handle">Drag</div><div class="dd3-content">Item 14</div>
                </li>
                <li class="dd-item dd3-item" data-id="15">
                    <div class="dd-handle dd3-handle">Drag</div><div class="dd3-content">Item 15</div>
                    <ol class="dd-list">
                        <li class="dd-item dd3-item" data-id="16">
                            <div class="dd-handle dd3-handle">Drag</div><div class="dd3-content">Item 16</div>
                        </li>
                        <li class="dd-item dd3-item" data-id="17">
                            <div class="dd-handle dd3-handle">Drag</div><div class="dd3-content">Item 17</div>
                        </li>
                        <li class="dd-item dd3-item" data-id="18">
                            <div class="dd-handle dd3-handle">Drag</div><div class="dd3-content">Item 18</div>
                        </li>
                    </ol>
                </li>
            </ol>
        </div>

    </div>

<script src="jquery.min.js"></script>
<script src="jquery.nestable.js"></script>
<script>

$(document).ready(function()
{

    var updateOutput = function(e)
    {
        var list   = e.length ? e : $(e.target),
            output = list.data('output');
        if (window.JSON) {
            output.val(window.JSON.stringify(list.nestable('serialize')));//, null, 2));
        } else {
            output.val('JSON browser support required for this demo.');
        }
    };

    // activate Nestable for list 1
    $('#nestable').nestable({
        group: 1
    })
    .on('change', updateOutput);
    
    // activate Nestable for list 2
    $('#nestable2').nestable({
        group: 1
    })
    .on('change', updateOutput);

    // output initial serialised data
    updateOutput($('#nestable').data('output', $('#nestable-output')));
    updateOutput($('#nestable2').data('output', $('#nestable2-output')));

    $('#nestable-menu').on('click', function(e)
    {
        var target = $(e.target),
            action = target.data('action');
        if (action === 'expand-all') {
            $('.dd').nestable('expandAll');
        }
        if (action === 'collapse-all') {
            $('.dd').nestable('collapseAll');
        }
    });

    $('#nestable3').nestable();

});
</script>
</body>
</html>
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