JSFiddle - React, Tailwind, and code Playground

HTML

<div id="divMenuWrapper1" class="divMenuWrapper1">
    <div id="hoverli">
        <div class="lbtn">
            Actions
        </div>
        <div id="actions_menu" class="file_menu">
            <div><a href="#file">File</a></div>
            <div><a href="#edit">Edit</a></div>
            <div><a href="#view">View</a></div>
            <hr />
            <div><a href="#insert">Insert</a></div>
            <div><a href="#modify">Modify</a></div>
            <div><a href="#control">Control</a></div>
            <div><a href="#debug">Debug</a></div>
            <div><a href="#window">Window</a></div>
            <div><a href="#help">Help</a></div>
        </div>
    </div>
</div>

<div>
    testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu testing content below menu 
</div>

CSS

.lbtn
{
    display:inline-block;
    cursor:pointer;
    height:20px;
    background-color:silver;
    background-repeat:repeat-x;      
    border:1px solid black; /* dark navy blue */ 
    text-decoration:none;
    font-size:11pt;
    text-align:center;
    line-height:20px;
    padding:0px 10px 0px 10px;
}

.divMenuWrapper1
{
    height: 25px;
    width: 75px;
}

.file_menu 
{
    display:none;
    width:250px;
    border: 1px solid #1c1c1c;
    background-color: white;
    position:relative;
    z-index:100000;
}

.file_menu div 
{
    background-color: white;
    font-size:10pt;
}

.file_menu div a 
{
    color:gray; 
    text-decoration:none; 
    padding:3px; 
    padding-left:15px;
    display:block;
}

.file_menu div a:hover 
{
    padding:3px;
    padding-left:15px;
    text-decoration:underline;
    color: black;
}

JavaScript

$("#hoverli").hover(
    function () {
        $('#actions_menu').finish().slideDown('fast');
    },
    function () {
        $('#actions_menu').finish().slideUp('fast');
    }
);