JSFiddle - React, Tailwind, and code Playground

HTML

<nav id="site-navigation" class="main-navigation" role="navigation">
                            <button class="menu-toggle" aria-controls="primary-menu" aria-expanded="false"><i class="fa fa-bars" aria-hidden="true"></i> Menu</button>
                            <div class="menu-main-menu-container"><ul id="primary-menu" class="nav-menu" aria-expanded="false"><li id="menu-item-67" class="menu-item menu-item-type-post_type menu-item-object-page current-menu-item page_item page-item-5 current_page_item menu-item-67"><a href="http://www.sidimaag.burnnotice.co.za/">Home</a></li>
<li id="menu-item-66" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-66" aria-haspopup="true"><a href="http://www.sidimaag.burnnotice.co.za/about/">About</a><button class="dropdown-toggle" aria-expanded="false"><span class="screen-reader-text">expand child menu</span></button>
<ul class="sub-menu">
	<li id="menu-item-432" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-432"><a href="http://www.sidimaag.burnnotice.co.za/mission/">Mission</a></li>
	<li id="menu-item-68" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-68"><a href="http://www.sidimaag.burnnotice.co.za/vision/">Vision</a></li>
	<li id="menu-item-429" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-429"><a href="http://www.sidimaag.burnnotice.co.za/organisation/">Organisation</a></li>
</ul>
</li>
<li id="menu-item-65" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-65" aria-haspopup="true"><a href="http://www.sidimaag.burnnotice.co.za/services/">Services</a><button class="dropdown-toggle" aria-expanded="false"><span class="screen-reader-text">expand child menu</span></button>
<ul class="sub-menu">
	<li id="menu-item-76" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-76"><a...

CSS

/* ul#primary-menu > li:active ul.sub-menu,
ul#primary-menu > li:hover ul.sub-menu {
    display: block !important;
    padding: 10px;
    padding-top: 5px;        
} */

ul.sub-menu li.current-menu-item {
    border: 0 !important;
}

.main-navigation a {
    display: block;
    padding: 0.8em 0;
    position: relative;
    text-decoration: none;
}

.main-navigation ul {
    list-style: none;
    margin: 0;
}

.dropdown-toggle{
    position: absolute;
    height: 27px;
    width: 15px;
    top: 16px;
    right: 2px;
    -webkit-box-sizing: content-box;
    -moz-box-sizing: content-box;
    -box-sizing: content-box;
    padding: 0;
    font-family: 'FontAwesome';
    background-color: transparent;
    border: 0;
    content: "";
    color: #99c71b;
    text-transform: lowercase;
}

.dropdown-toggle:after{
    content: "\f078";
    font-size: 14px;
    line-height: 27px;
    position: relative;
    top: 0;
    left: 1px;
    width:27px;
}

button.dropdown-toggle.toggle-on:after {
    font-family: FontAwesome !important;
    content: '\f077' !important;
    color: black !important;
}

.main-navigation ul ul {       
    display: none;                                                                                                 
}  

.main-navigation ul .toggled-on {
    display: block;
}

.main-navigation li {
    border-top: 1px solid #eaeaea;
    border-top: 1px solid rgba(51, 51, 51, 0.1);
    position: relative;
}
/*.main-navigation .current-menu-item, .main-navigation .current-menu-ancestor > ul#primary-menu > li {
    font-weight: 700;
    border-top: 3px solid #99c71b !important;   
}*/


.main-navigation .current-menu-item {
    font-weight: 700;
    border-top: 3px solid #99c71b !important;
}
.sub-menu.toggled-on li.current_page_item {
    border-top: 0 !important;
}

.main-navigation .nav-menu > ul > li:first-child,
.main-navigation .nav-menu > li:first-child {
	border-top: 0;
}

.main-navigation .menu-item-has-children > a {
	padding-right:...

JavaScript

$(document).ready(function (){            

           $( "ul#primary > li.menu-item-has-children" ).click(function( e ) {
               $("ul.sub-menu").slideToggle();      

           }).dblclick(function(){
                window.location($(this).attr("href"));
            });   
        });