JSFiddle - React, Tailwind, and code Playground

by Guruprasad Rao

HTML

<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>

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;...

JavaScript

/*!
 * Nestable jQuery Plugin - Copyright (c) 2012 David Bushell - http://dbushell.com/
 * Dual-licensed under the BSD or MIT licenses
 */
;(function($, window, document, undefined)
{
    var hasTouch = 'ontouchstart' in document;

    /**
     * Detect CSS pointer-events property
     * events are normally disabled on the dragging element to avoid conflicts
     * https://github.com/ausi/Feature-detection-technique-for-pointer-events/blob/master/modernizr-pointerevents.js
     */
    var hasPointerEvents = (function()
    {
        var el    = document.createElement('div'),
            docEl = document.documentElement;
        if (!('pointerEvents' in el.style)) {
            return false;
        }
        el.style.pointerEvents = 'auto';
        el.style.pointerEvents = 'x';
        docEl.appendChild(el);
        var supports = window.getComputedStyle && window.getComputedStyle(el, '').pointerEvents === 'auto';
        docEl.removeChild(el);
        return !!supports;
    })();

    var defaults = {
            listNodeName    : 'ol',
            itemNodeName    : 'li',
            rootClass       : 'dd',
            listClass       : 'dd-list',
            itemClass       : 'dd-item',
            dragClass       : 'dd-dragel',
            handleClass     : 'dd-handle',
            collapsedClass  : 'dd-collapsed',
            placeClass      : 'dd-placeholder',
            noDragClass     : 'dd-nodrag',
            emptyClass      : 'dd-empty',
            expandBtnHTML   : '<button data-action="expand" type="button">Expand</button>',
            collapseBtnHTML : '<button data-action="collapse" type="button">Collapse</button>',
            group           : 0,
            maxDepth        : 5,
            threshold       : 20
        };

    function Plugin(element, options)
    {
        this.w  = $(document);
        this.el = $(element);
        this.options = $.extend({}, defaults, options);
        this.init();
    }

    Plugin.prototype = {

       ...