Magento

To use the mmenu.js plugin in a Magento project, add "magento" to the wrappers option.

<script>
   document.addEventListener(
      "DOMContentLoaded", () => {
         new Mmenu( "#my-menu", {
            wrappers: ["magento"]
         });
      }
   );
</script>

What it does

Using the "magento" wrapper will set the classNames.selected configuration option to the default classname used by Magento.

Next wrapper:
Olark