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Create a Multi-Level Hierarchy in the Drawer


Product Progress® Kendo UI® Drawer for jQuery


I examined the Drawer Hierarchy demo which shows two levels of hierarchy. However, I want to have multiple nested levels of submenus. How can I extend the logic from the demo to add more submenus to the Drawer? Additionally, how can I retrieve all of the parent elements of the selected submenu?


To achieve the desired scenario:

  1. Create a function that will be used to add menus and submenus to the Drawer configuration.
  2. Attach a handler to the itemClick event of the Drawer.
  3. The logic of the itemClick event will either expand or collapse the children of the menu that was clicked.
    • The collapseAll function collapses every descendant of the clicked menu.
    • The getParentsRecursively function retrieves all of the parents of the clicked submenu.
  4. Attach a handler to the hide event of the Drawer.
  5. The logic of the hide event will collapse all of the submenus.

The following example demonstrates the full implementation of the approach.

    <button id='show'>Show Drawer</button>
    <button id='hide'>Hide Drawer</button>


    <div id="drawer">
      <div id="drawer-content">
        <div id="About" class="hidden">
          <h4 class="header">Kendo UI</h4>
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            Check all available components of Kendo UI for jQuery at the following
            <a href="">Demos</a>

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      // Show the drawer when the "Show Drawer" button is clicked.
      $("#show").on("click", function(e) {
        var drawerInstance = $("#drawer").data().kendoDrawer;;

      // Hide the drawer when the "Hide Drawer" button is clicked.
      $("#hide").on("click", function(e) {
        var drawerInstance = $("#drawer").data().kendoDrawer;

      // The addItem logic is used to create menus/submenus. Check the drawer configuration for the syntax.

        id = the data-id of the element which will be used to target the clicked element and perform operations.
        title = what will be displayed in the menu
        parent - the id of the parent element(if the element has one)
        isParent - specifies whether the element is a parent of other elements or not.
        icon - specifies an icon for the element.
        level - specifies the level on which the element is located. Example - Getting Started, Overview, Most Popular - level 0, Getting Started->Supported Themes - level 1, Getthing Started->Supported Themes->About Kendo UI - level 2, etc.

        The level logic is used for indentation of the sub-menu items.
      function addItem(id, title, parent, isParent, icon, level) {
        // Create the <li> element 
        let liStart = `<li data-role='drawer-item' ${parent ? 'class=hidden' : ''} data-parent='${parent}' data-is-parent='${isParent}'>`;
        let liEnd = "</li>";
        let element = "";

        // Check the level of nesting and add that many indentations for the submenu.
        for(let i=0; i<level; i++) {
          element += "<span class='k-icon k-i-none'></span>";

        // Add the element with its title and id.
        element += `<span class='k-icon ${icon}'></span><span class='k-item-text' data-id='${id}'>${title}</span>`;

        // Check if the element is a parent and add an icon for the expand arrow.
        if(isParent) {
          element += "<span class='k-spacer'></span><span class='k-icon chevron-right'></span>";

        // If the element is a parent, add a line separator too.
        let separator = isParent ? `<li data-role='drawer-separator' ${level > 0 ? "class='hidden'" : ""}></li>` : "";

        // Create the final result.
        let result = liStart + element + liEnd + separator;

        return result;

      $(document).ready(function () {
          template: `<ul>
                  ${addItem("GettingStarted", "Getting Started", null, true, "information", 0)}
                  ${addItem("ThemeSupport", "Supported Themes", "GettingStarted", true, "palette", 1)}
                  ${addItem("Kendo", "About Kendo UI", "ThemeSupport", true, "question", 2)}
                  ${addItem("FourthLevel", "Fourth Level Menu", "Kendo", false, "question", 3)}
                  ${addItem("AnotherFourthLevel", "Another Fourth Menu", "Kendo", false, "question", 3)}
                  ${addItem("Third ", "Third Menu", "Kendo", false, "question", 3)}
                  ${addItem("Fourth", "Some Additional Menu", "Kendo", false, "question", 3)}
                  ${addItem("Overview", "Overview", null, true, "zoom", 0)}
                  ${addItem("About", "About Kendo UI", "Overview", false, "question", 1)}
                  ${addItem("All", "All Kendo UI Components", "Overview", false, "js", 1)}
                  ${addItem("Popular", "Most Popular Components", null, false, "border-radius", 0)}
          mode: "push",
          itemClick: onItemClick,
          autoCollapse: false,
          position: 'left',
          mini: {
            width: 45
          minHeight: 330,
          swipeToOpen: true,
          hide: onHide

            kendo.ui.icon($(".information"), { icon: 'info-circle' });

                    kendo.ui.icon($(".palette"), { icon: 'palette' });

                kendo.ui.icon($(".question"), { icon: 'question-circle' });

                    kendo.ui.icon($(".zoom"), { icon: 'zoom-in' });

                    kendo.ui.icon($(".js"), { icon: 'js' });

        function onItemClick(e) {          
          if (!e.item.hasClass("k-drawer-separator")) {
            var drawerContainer = e.sender.drawerContainer;
            var expandIcon = e.item.find("span.chevron-right");
            var collapseIcon = e.item.find("span.chevron-down");
            let id = e.item.find(".k-item-text").data("id");
            let children = drawerContainer.find("[data-parent='"+id+"']");
            // Hide the content of the current menu/submenu.
            drawerContainer.find("#drawer-content > div").addClass("hidden");
            // Show the content of the clicked menu/submenu
            drawerContainer.find("#drawer-content").find("#" + e.item.find(".k-item-text").attr("data-id")).removeClass("hidden");

            // If the menu is collapsed, expand its direct children on click.
            if(expandIcon.length) {
              children.each(function(i, x) {
                if($(x).prev().is(".k-drawer-separator")) {
        kendo.ui.icon($(".chevron-down"), { icon: 'chevron-down' });

            // If the menu is expanded, collapse all of its children on click.
            if(collapseIcon.length) {
              collapseAll(children, collapseIcon, drawerContainer);
              kendo.ui.icon($(".chevron-right"), { icon: 'chevron-right' });

            // Retrieve all parents of the clicked element.
            if(!"is-parent")) {
              let parents = getParentsRecursively(e.item);
              parents.forEach((parent) => {

        // This logic is executed when the Drawer is collapsed/hidden.
        function onHide() {
          let element = this.drawerElement,
              container = this.drawerContainer;
          let topLevelMenus = element.find("[data-parent='null']");
          topLevelMenus.each(function(i, menu) {
            menu = $(menu);
            let id = menu.find(".k-item-text").data("id"),
                children = container.find("[data-parent='"+id+"']");

            // Collapse all of the submenus when the drawer is hidden.
            collapseAll(children, null, container);
            kendo.ui.icon($(".chevron-right"), { icon: 'chevron-right' });

        var drawerInstance = $("#drawer").data().kendoDrawer;;

        kendo.ui.icon($(".chevron-right"), { icon: 'chevron-right' });

        // Collapses all children when a parent item is clicked or when the Drawer is hidden.
        function collapseAll(children, collapseIcon, drawerContainer) {
          children.each(function(i, x) {
            let isParent = $(x).data("is-parent");

            let id = $(x).find(".k-item-text").data("id");
            collapseIcon = $(x).find("span.chevron-down");
            children = drawerContainer.find("[data-parent='"+id+"']");

            if(isParent) {
              collapseAll(children, collapseIcon, drawerContainer);


            if($(x).prev().is(".k-drawer-separator") && $(x).prev().prev().data("parent")) {

            if($(".chevron-right").length > 0){
            kendo.ui.icon($(".chevron-right"), { icon: 'chevron-right' });


        // Retrieves the parent elements of the clicked item.
        function getParentsRecursively(item, result = []) {
          let parentId = '[data-id="'"parent")+'"]';
          let parentItem = drawerInstance.drawerElement.find(parentId).closest("li");
          if(parentItem.length) {
            getParentsRecursively(parentItem, result);

          return result;
      #drawer-content li {
        font-size: 1.2em;
        padding-left: .89em;
        background: 0 0;
        border-radius: 0;
        border-width: 0 0 1px;
        border-color: rgba(33, 37, 41, 0.125);
        line-height: 1.5em;
        padding: 0em 0.4em 0.7em .84em

      #drawer-content li:last-child {
        border: 0;

      .hidden {
        display: none;

      #demo-runner #example div.demo-section {
        max-width: 800px;

      .k-toolbar .k-icon {
        font-size: 18px;

      #drawer-content ul {
        margin-top: 0;
        margin-bottom: 1rem;

      h6 {
        font-size: 1rem;
        margin-bottom: .5rem;
        font-family: inherit;
        font-weight: 500;
        line-height: 1.2;
        color: inherit;

      .k-drawer-content {
        padding: 15px;

      .kendoka {
        margin: 0 auto;
        width: 300px;
        height: 300px;
        background-size: cover;
        background-image: url('');

      .header {
        text-align: center;
        margin-bottom: 30px;
        margin-left: 8px;
        font-weight: bold;
        font-size: 20px;
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