Slide Menu

ℹ️ This project is a fork from https://github.com/grubersjoe/slide-menu. See Original Demo

A library agnostic, dependency free multilevel page menu with a smooth slide effect based on CSS transitions and various options. Allows foldable submenu structures for desktop views.

Install

npm install smdm-slide-menu

You can include smdm-slide-menu as standalone script or as a module.

Option 1 (Module)

import {SlideMenu} from 'smdm-slide-menu';
// You can use smdm-slide-menu here right away
const menuElement = document.getElementById('example-menu');
const menu = new SlideMenu(menuElement);

Also make sure to include the css like import 'smdm-slide-menu/dist/slide-menu.css'

Option 2 (Standalone Script)

Use import 'smdm-slide-menu/dist/slide-menu.js' and import 'smdm-slide-menu/dist/slide-menu.css' in your bundler or build system of choice or use a 1998 <script> and <link> tag to load the menu anywhere in your HTML document. The SlideMenu class will be available in the global namespace (window.SlideMenu) as soon as the "sm.ready" Event has been fired.

const initSlideMenu = () => {
  const menuElement = document.getElementById('example-menu');
  const menu = new SlideMenu(menuElement);
};

if(window.SlideMenu) {
  initSlideMenu()
} else {
  window.addEventListener("sm.ready", initSlideMenu);
}

Usage

All you need is the traditional menu HTML markup and a wrapper with the class slide-menu. Menus can be nested endlessly to create the desired hierarchy. If you wish to programmatically control the menu, you should also set IDs to be able to use the API (see below).

Example

<nav class="slide-menu" id="example-menu">
  <ul>
    <li>
      <a href="/">Home</a>
      <ul>
        <li><a href="#">Submenu entry 1</a></li>
        <li><a href="#">Submenu entry 2</a></li>
        <li><a href="#">Submenu entry 3</a></li>
      </ul>
    </li>
    <li>
      <a href="/blog">Blog</a>
    </li>
    <li>
      <a href="/about">About</a>
    </li>
  </ul>
</nav>

Options

The SlideMenu() constructor takes an optional second parameter to pass in various options:

Option | Description | Valid values | Default --- | --- | --- | --- backLinkAfter | HTML to append to back link in submenus | HTML code | '' backLinkBefore | HTML to prepend to back link in submenus | HTML code | '' keyClose | Key used to close the menu | Any valid KeyboardEvent key | Escape keyOpen | Key used to open the menu | Any valid KeyboardEvent key | undefined position | Position of the menu | 'left' or 'right' | 'right' showBackLink | Add a link to navigate back in submenus (first entry) | boolean | true submenuLinkBefore | HTML to prepend to links with a submenu | HTML code | '' submenuLinkAfter | HTML to append to links with a submenu | HTML code | '' closeOnClickOutside | Menu closes when clicked outside menu element | boolean | false onlyNavigateDecorator | Prevents navigation when clicking the link directly, triggers menu slide navigation only when clicking the link decorator elements | boolean | false menuWidth | Width of the menu slider (without fold) | number | 320 minWidthFold | Minimum window width in pixel for fold menu to be shown as fold not as slide | number | 640 transitionDuration | Duration of slide animation in milliseconds | number | 300 dynamicOpenTarget | Dynamically determine the default menu that will be opened based on current location.pathname or location.hash (especially useful for SPA's) | boolean | false debug | Shows verbose logs / warnings | boolean | false

Example:

const initSlideMenu = () => {
  const menu = new SlideMenu(document.getElementById('example-menu'),{
      showBackLink: false,
      submenuLinkAfter: '<strong>⇒</strong>'
  });
};

API

You can call the API in two different ways:

• Reuse the reference to the SlideMenu instance:

  const menu = new SlideMenu(document.getElementById('example-menu'));
  
  // ... later
  menu.close();

• The SlideMenu instance is also added as property of the menu DOM element. So if you need to control an existing menu without a reference to it, you can fetch it any time this way:

  const menu = document.getElementById('example-menu')._slideMenu;
  menu.open();

Methods / Actions

• close(animate = true) - Close the menu
• back(closeFold = false) - Navigate on level back if possible. Additionally closes fold
• navigateTo(target) Open the menu level which contains specified menu element. target can either be a document.querySelector compatible string selector or the the DOM element (inside the menu). The first found element (if any) will be used.
• show(animate = true) - Shows the menu if closed
• open(animate = true) - Opens the menu if closed an potentially navigates to target
  • If attribute data-open-target="..." is provided in the root menu element the menu will navigate to that target per default. Target must be a document.querySelector compatible string
  • If option dynamicOpenTarget is true opens submenu matching the currently active slug or hash in the browser URL (e.g. if you are on the page https://example.com/about slide menu will try to open the submenu of the item <a href="/about">About</a> or open the submenu containing it)
• toggle(animate = true) - Toggle the menu (if defined opens the data-open-target="..." / dynamicOpenTarget by default)

Events

For initializing SlideMenu, as soon as the SlideMenu class can be used globally the event sm.ready is fired on the window object.

SlideMenu emits events for all kind of actions, which trigger as soon as the action is method is called. Plus, all events have also an <event>-after equivalent, which is fired after the step is complete (completely animated).

• sm.back[-after] fires immediately when navigating backwards in the menu hierarchy or after the animation is complete respectively.
• sm.close[-after] fires immediately when the close() method is called or after the animation is complete respectively.
• sm.forward[-after]fires immediately when navigating forward in the menu hierarchy or after the animation is complete respectively.
• sm.navigate[-after]fires immediately when calling the navigateTo() method or after the animation is complete respectively.
• sm.open[-after] fires immediately when the open() method is called or after the animation is complete respectively.
• sm.init fires when the slide menu object is finished initializing.

Make sure to add the event listener to the HTML element, which contains the menu, since the events for this specific menu are dispatched there:

const initSlideMenu = () => {
  const menuElement = document.getElementById('example-menu');
  const menu = new SlideMenu(menuElement);

  // Attach the event listener to the *DOM element*, not the SlideMenu instance
  menuElement.addEventListener('sm.open', function () {
    console.log('The menu opens');
  });

  menuElement.addEventListener('sm.open-after', function () {
    console.log('The menu has opened');
  });
}

if(window.SlideMenu) {
  initSlideMenu();
} else {
  window.addEventListener("sm.ready", function () {
    initSlideMenu();
  });
}

Define default submenu

To open a specific submenu with the open or toggle action you can give the slide menu element the attribute data-open-target and pass the id, href or a css selector for the desired target submenu item. Example:

<nav class="slide-menu" id="example-menu" data-open-target="default-submenu">
  <ul>
    <li>
      <a href="/blog">Blog</a>
    </li>
    <li>
      <a id="default-submenu" href="/submenu">Submenu</a>
      <ul>
        <!-- this submenu wil be opened as default -->
        <li><a href="#">Submenu entry 1</a></li>
        <li><a href="#">Submenu entry 2</a></li>
        <li><a href="#">Submenu entry 3</a></li>
      </ul>
    </li>
    <li>
      <a href="/about">About</a>
    </li>
  </ul>
</nav>

Menu Overlay

To add an overlay over the screen while the menu is open add an element with class="slide-menu__overlay" before the slide menu. It uses --smdm-sm-color-overlay as default color which can be adjusted as needed.

<div class="slide-menu__overlay">
<nav class="slide-menu" id="example-menu">
  ...
</nav>

Control buttons

Buttons to control the menu can be created easily. Add the class slide-menu__control to anchors or buttons and set the data attributes target to the ID of the desired menu and action to the API method:

<button type="button" class="slide-menu__control" data-target="example-menu" data-action="open">Open</button>
<button type="button" class="slide-menu__control" data-target="example-menu" data-action="back">Back</button>
<button type="button" class="slide-menu__control" data-target="example-menu" data-action="toggle">Toggle</button>
<button type="button" class="slide-menu__control" data-target="example-menu" data-action="navigateTo" data-arg="blog">Navigate to #blog</button>

Inside the menu container the attribute data-target can be omitted or set to to the string this to control this menu.

<a class="slide-menu-control" data-target="example-menu" data-action="close">Close this menu</a>
<a class="slide-menu-control" data-target="this" data-action="close">Close this menu</a>
<a class="slide-menu-control" data-action="close">Close this menu</a>

Menu Title

A dynamic menu title slide-menu__title can optionally be added anywhere in the menu structure (e.g. in the slide-menu__controls). The title will be updated dynamically according to the current menu level.

<nav class="slide-menu" id="test-menu-left">
  <div class="slide-menu__controls">
    ...
    <div class="slide-menu__title">Submenu Title</div>
    ...
  </div>
  <ul>
    ...
  </ul>
</nav>

Foldable Submenus

Foldable submenus can be created using the class slide-menu__item--has-foldable-submenu on the item that precedes the submenu.

...
<li>
  <a class="slide-menu__item--has-foldable-submenu" href="#"><span>Foldable</span></a>
  <ul>
    ...foldable submenu items go here...
  </ul>
</li>
...

Foldable Submenus will only fold open if the window width is bigger than the configured minWidthFold.

Additonal Content within the Menu

Any arbitrary additonal content (e.g. search input fields, detail info, images,...) can be inserted anywhere in the menu structure. The class slide-menu--additional-content provides standard padding like it is used for the menu items. Example:

<nav class="slide-menu" id="test-menu-left">
  <div class="slide-menu__controls">
    ...
  </div>
  <div class="slide-menu--additional-content">
    <img src="https://studiomitte.com/build/images/logo/logo-white.svg" alt="Studiomitte Logo">
    <p>Some detail text</p>
  </div>
  <ul>
    ...
  </ul>
</nav>

Close Menu Links in the End of Submenus

To add Links for closing the menu in the end of Submenus for convenient keyboard navigation you can add additional navigation items in the HTML with class="slide-menu__control" and a data-action="close" like the following example:

<ul>
  <li>...Menu item 1...</li>
  <li>...Menu item 2...</li>
  <li><a href="#" data-action="close" class="slide-menu__control">X Close</a></li>
</ul>

Manually created Backlinks in Submenus

If you want to insert backlinks manually like in the following example use the attribute data-action="back" on them. Additonally, use the attribute data-arg="close-fold" on the backlink, if you intend to close all the currently open foldable submenus.

<ul>
  <li><a href="#" data-action="back" class="slide-menu__control">🔙 Backlink</a></li>
  <li>...Menu item 1...</li>
  <li>...Menu item 2...</li>
</ul>

💡 Backlinks can also be generated automatically with the option showBackLink and the contents backLinkAfter / backLinkBefore.

Styling the Menu

Basic Styling is provided by slide-menu. To adjust it to your theme select the elements by the classes slide menu applies to the elements.

The following default CSS variables can be overwritten as needed:

:root {
  --smdm-sm-transition-easing: ease-in-out;
  --smdm-sm-color-bg: rgb(10 10 9);
  --smdm-sm-color-text: rgb(238 237 235);
  --smdm-sm-color-active: rgb(32 31 29);
  --smdm-sm-color-hover: rgb(20 20 19);
  --smdm-sm-color-controls: rgb(20 20 19);
  --smdm-sm-color-overlay: rgba(0, 0, 0, 0.3);
  --smdm-sm-item-padding: 0.9rem 1.5rem;
}

Development

# if using with ddev first do
ddev start
ddev ssh -s frontend
# then open https://slide-menu.frontend.ddev.site:9999/

# for development run
npm install
npm run watch

# run e2e tests (in cypress container)
npm run test

Build

Create a production build for release:

# outside of ddev container
npm run build
# or
npm run pre-version # includes linting & checks

Publish Package Release

https://docs.npmjs.com/creating-and-publishing-unscoped-public-packages

npm login

npm run version-patch # increments & commits patch version number
# or
npm run version-minor # increments & commits minor version number

# commit changes

npm run post-version

Testing Package - Install locally

Test package in a project and install it locally:

npm install path/to/my-package

Testing Package - Install through NPM

Install package through npm package registry:

npm install smdm-slide-menu@latest