JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.5/themes/cupertino/jquery-ui.css">
<script src="http://dropdown-check-list.googlecode.com/svn/trunk/doc/ui.dropdownchecklist.js"></script>
<select id="s1" multiple="multiple">
    <option>Low</option>
    <option>Medium</option>
    <option>High</option>
    
</select>

JavaScript

(function($) {
    $.ui.dropdownchecklist.prototype.open = function() {
        this._toggleDropContainer(true);
    }
})(jQuery);

$(function() {
    $("#s1").dropdownchecklist();
    $('#ddcl-s1').mouseenter(function() {
    alert('Hi');
        $("#s1").dropdownchecklist('close');
    });
});