JSFiddle - React, Tailwind, and code Playground

by Town

HTML

<div class="ms-quickLaunch">
    <div class="menu">
        <ul class="root static">
            <li class="static linksBelow">
                <a href="#" class="static menu-item">
                    <span class="additional-background">
                        <span class="menu-item-text">Manage</span>
                    </span>
                </a>
                <ul class="static" style="display: none;">
                    <li>
                        <a href="javascript:open();" class="static menu-item">
                            <span class="additional-background">
                                <span class="menu-item-text">Manage List</span>
                            </span>
                        </a>
                        <a href="#" class="static menu-item">
                            <span class="additional-background">
                                <span class="menu-item-text">Manage Documents</span>
                            </span>
                        </a>
                    </li>
                </ul>
            </li>
        </ul>
    </div>
</div>

CSS

root {display: none;}

JavaScript

var anchor = $('.ms-quickLaunch .menu ul.static li a');
if ($('.menu-item-text', anchor).html() === "Manage")
{
    anchor.next("ul").show();
}