JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarNavDropdown">
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricing</a>
      </li>
      <li class="nav-item dropdown">
                            <a class="nav-link dropdown-toggle" href="https://bootstrapthemes.co" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                Dropdown link
                            </a>
                            <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                                <li><a class="dropdown-item" href="#">Action</a></li>
                                <li><a class="dropdown-item" href="#">Another action</a></li>
                                <li><a class="dropdown-item dropdown-toggle" href="#">Submenu</a>
                                    <ul class="dropdown-menu">
                                        <li><a class="dropdown-item" href="#">Submenu action</a></li>
             ...

CSS

.navbar-light .navbar-nav .nav-link {
    color: rgb(64, 64, 64);
}
.btco-menu li > a {
    padding: 10px 15px;
    color: #000;

}

.btco-menu .active a:focus,
.btco-menu li a:focus ,
.navbar > .show > a:focus{
    background: transparent;
    outline: 0;
}


.dropdown-menu .show > .dropdown-toggle::after{
    transform: rotate(-90deg);
}

JavaScript

$( document ).ready( function () {
    $( '.navbar a.dropdown-toggle' ).on( 'click', function ( e ) {
        var $el = $( this );
        var $parent = $( this ).offsetParent( ".dropdown-menu" );
        $( this ).parent( "li" ).toggleClass( 'show' );

        if ( !$parent.parent().hasClass( 'navbar-nav' ) ) {
            $el.next().css( { "top": $el[0].offsetTop, "left": $parent.outerWidth() - 4 } );
        }
        $( '.navbar-nav li.show' ).not( $( this ).parents( "li" ) ).removeClass( "show" );
        return true;
    } );
} );