JSFiddle - React, Tailwind, and code Playground

HTML

<div class="dropdown">
        <button class="dropbtn">Regions</button>
        <div class="dropdown-content">
            <ul id="regionList"></ul>           
        </div>
    </div>

CSS

/* Dropdown Button */
.dropbtn {
    background-color: #9FACEC;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
}

/* The container <div> - needed to position the dropdown content */
.dropdown {
    position: relative;
    display: inline-block;
}

/* Dropdown Content (Hidden by Default) */
.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f1f1f1;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

/* Links inside the dropdown */
.dropdown-content li {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

/* Change color of dropdown links on hover */
.dropdown-content li:hover {background-color: #ddd;}

/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {display: block;}

/* Change the background color of the dropdown button when the dropdown content is shown */
.dropdown:hover .dropbtn {background-color: #4C66E9;}

ul{
padding: 0;
margin: 0;
}

JavaScript

$(document).ready(function () {
  	
    var $region = $('#regionList');
    $region.append('<li id="Europe">Europe</li>');
    $region.append('<li id="Japan">Japan</li>');
    $region.append('<li id="North America">North America</li>');
    
    $("#regionList li").click(function() {
       alert('Clicked list. ' + this.id);
});
  
})