JSFiddle - React, Tailwind, and code Playground

HTML

<a href="javascript:void(0);" id="click1" class="clickme">Click me 1</a>
<ul id="sub-level-1" style="display:none">
    <li><a href="#">Dropdown link</a></li>
    <li><a href="#">Dropdown link</a></li>
</ul>
<br><a href="javascript:void(0);" class="clickme">Click me 2</a>
<ul style="display:none">
    <li><a href="#" target="_blank">Dropdown link</a></li>
    <li><a href="#">Dropdown link</a></li>
</ul>

JavaScript

$(document).ready(function(){
    if (window.location.href.indexOf("#dropdown-link-name") > -1) {
        $('#dropdown-class-name').closest("#sub-level-1").css("display","block");
    }
});