https://github.com/Turbo87/sidebar-v2/issues

leaflet-sidebar.js

L.Control.Sidebar = L.Control.extend({
    includes: L.Mixin.Events,

    initialize: function (id, options) {
        var i, child;

        L.setOptions(this, options);

        // Find sidebar HTMLElement
        this._sidebar = L.DomUtil.get(id);

        // Attach touch styling if necessary
        if (L.Browser.touch)
            L.DomUtil.addClass(this._sidebar, 'leaflet-touch');

        // Find sidebar > ul.sidebar-tabs and sidebar > div.sidebar-content
        for (i = this._sidebar.children.length - 1; i >= 0; i--) {
            child = this._sidebar.children[i];
            if (child.tagName == 'UL' &&
                    L.DomUtil.hasClass(child, 'sidebar-tabs'))
                this._tabs = child;

            else if (child.tagName == 'DIV' &&
                    L.DomUtil.hasClass(child, 'sidebar-content'))
                this._container = child;
        }

        // Find sidebar > ul.sidebar-tabs > li
        this._tabitems = [];
        for (i = this._tabs.children.length - 1; i >= 0; i--) {
            child = this._tabs.children[i];
            if (child.tagName == 'LI') {
                this._tabitems.push(child);
                child._sidebar = this;
            }
        }

        // Find sidebar > div.sidebar-content > div.sidebar-pane
        this._panes = [];
        for (i = this._container.children.length - 1; i >= 0; i--) {
            child = this._container.children[i];
            if (child.tagName == 'DIV' &&
                L.DomUtil.hasClass(child, 'sidebar-pane'))
                this._panes.push(child);
        }

        this._hasTouchStart = L.Browser.touch &&
            ('ontouchstart' in document.documentElement);
    },