How to make use of it:

Import the stylesheet mmenu-light.css and JavaScript mmenu-light.js into the HTML.

<link rel="stylesheet" href="./dist/mmenu-light.css" />
<script src="./dist/mmenu-light.js"></script>

Create an anchor link for the hamburger toggle button.

<a href="#menu"><span></span></a>

Create a multi-level off-canvas menu from nested HTML lists.

<nav id="menu">
  <ul>
    <li class="Selected"><a href="#">Home</a></li>
    <li><span>About us</span>
      <ul>
        <li><a href="#about/history">History</a></li>
        <li><span>The team</span>
          <ul>
            <li><a href="#about/team/management">Management</a></li>
            <li><a href="#about/team/sales">Sales</a></li>
            <li><a href="#about/team/development">Development</a></li>
          </ul>
        </li>
        <li><a href="#about/address">Our address</a></li>
      </ul>
    </li>
    <li><a href="#contact">Contact</a></li>
  </ul>
</nav>

Initialize the off-canvas navigation. Possible choices:

const menu = new MmenuLight( document.querySelector( '#menu' ), 'all');

Create a set navigation bar. Possible choices:

var navigator = menu.navigation({
    // selectedClass: 'Selected',
    // slidingSubmenus: true,
    // theme: 'dark',
    // title: 'Menu'
});

Activate the off-canvas navigation. Possible choices:

var drawer = menu.offcanvas({
    // position: 'left'
});

Enable the hamburger button to toggle the off-canvas navigation.

document.querySelector( 'a[href="#menu"]' )
.addEventListener( 'click', evnt => {
  evnt.preventDefault();
  drawer.open();
});

Open a panel within the navigation.

navigator.openPanel(
  menu.querySelector( "ul" );
);

Open/shut the navigation.

drawer.open();
drawer.close();

Lightweight Mobile App Navigation System, mmenu light Plugin/Github

See Demo And Download