JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://vadikom.github.io/smartmenus/src/jquery.smartmenus.js"></script>
<link rel="stylesheet" href="https://vadikom.github.io/smartmenus/src/css/sm-core-css.css">
<link rel="stylesheet" href="https://vadikom.github.io/smartmenus/src/css/sm-blue/sm-blue.css">
<div id="divMenu">
        <ul class="level1">
            <li><a title="Homepage" href="/SNV/index.aspx">Homepage</a></li><li>
                <a title="Main vehicles page" href="/SNV/Vehicles/vehicles.aspx">
                    Vehicles</a><ul class="level3">
                        <li><a href="/SNV/Vehicles/New_Vehicles.aspx">New Vehicles</a></li><li>
                            <a href="/SNV/Vehicles/Used_Vehicles.aspx">Used Vehicles</a><ul
                                class="level4">
                                <li><a href="/SNV/Vehicles/Side_Entry_Vehicles.aspx">Side Entry</a></li><li>
                                    <a href="/SNV/Vehicles/Rear_Entry_Vehicles.aspx">Rear Entry</a></li>
                            </ul>
                        </li>
                        <li><a href="/SNV/Vehicles/mv_1.aspx">MV-1</a><ul class="level4">
                            <li><a href="/SNV/Vehicles/mv_1/se_standard_edition.aspx">SE Standard
                                Edition</a></li>
                        </ul>
                        </li>
                        <li><a href="/SNV/Vehicles/Rentals_Accessible_Van.aspx">Accessible Van
                            Rentals</a></li><li><a href="/SNV/Vehicles/Commercial_Vans.aspx">
                                Commercial Vans</a><ul class="level4">
                                    <li><a href="/SNV/Vehicles/Norcal_Ford_Transit_Connect.aspx">Norcal Ford
                                        Transit Connect</a></li><li><a href="/SNV/Vehicles/Nissan_NV.aspx">Nissan
                                            NV</a></li>
                                </ul>
                            </li>
                        <li><a...

CSS

#main-menu {
	position:relative;
	z-index:9999;
	width:auto;
}
#main-menu ul {
	width:12em; /* fixed width only please - you can use the "subMenusMinWidth"/"subMenusMaxWidth" script options to override this if you like */
}

JavaScript

$(function() {
	$('#divMenu > ul').attr('id', 'main-menu').addClass('sm sm-blue').smartmenus({
		subMenusSubOffsetX: 1,
		subMenusSubOffsetY: -8
	});
});