JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <nav>
        <ul>
            <li><a href="#">Walk-In</a>
            </li>
            <li class="has-sub"><a href="#">Members</a> 
                <ul class="sub">
                    <li><a href="#">Subscr</a>
                    </li>
                    <li><a href="#">asdasd</a>
                    </li>
                    <li><a href="#">asdasd</a>
                    </li>
                </ul>
            </li>
            <li><a href="#">Sales</a>
            </li>
            <li><a href="#">Inventory</a>
            </li>
            <li><a href="#">Suppliers</a>
            </li>
            <li><a href="#">Reports</a>
            </li>
        </ul>
    </nav>
    <div id="content">SOME CONTENT YAY</div>
</div>

CSS

@import url(https://fonts.googleapis.com/css?family=Open+Sans:400italic,400,300italic,300);
*{
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Open Sans';
}

a{
    text-decoration: none;
}

header{
    width: 100%;
    height: 50px;
    border-bottom: 1px solid #858585;
}

.logo {
    float: left;
    margin-top: 9px;
    margin-left: 15px;  
}

.logo a{
    font-size: 1.3em;
    color: #070807;

}
.logo a span{
    font-weight: 300;
    color: #1AC93A;
}

nav{
    width: 250px;
    height: calc(100% - 50px);
    background-color: #171717;
    float: left;
}

#content {
    width: :auto;
    margin-left: 250px;
    height: calc(100% - 50px);
    padding: 15px
}

nav li{
    list-style: none;

}

nav li a{
    color: #ccc;
    display: block;
    padding: 10px;
    font-size: 0.8em;
    border-bottom: 1px solid #0a0a0a;
    -webkit-transition: 0.2s;
    -moz-transition: 0.2s;
    -o-transition: 0.2s;
    transition: 0.2s;
}

nav li a:hover{
    background-color: #030303;
    color: #fff;
    padding-left: 80px;
}

nav ul li ul {
    display: none;
}

/*nav ul li:hover > ul{
    display: block;

}*/

nav ul li.tap > ul{
    display: block;
}

JavaScript

$('.has-sub').click(function(e){
      console.log($(e.target).parent('.sub').length)
           if ($(e.target).parents('.sub').length == 0 ){
            $(this).toggleClass('tap');
           }
        });