Bootstrap 4 - nav bar align right, navbar-toggler

<div class="header" id="home">
<div class="container">
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<!-- class="navbar-brand"는 로고를 뜻한다. -->
<a class="navbar-brand" href="#">
logo
</a>

<!-- 햄버거메뉴 -->
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#mymenu" aria-controls="mymenu" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>

<div class="collapse navbar-collapse justify-content-end " id="mymenu">
<ul class="navbar-nav bg-info" >
<li class="nav-item">
<a class="nav-link" href="#">menu1</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" href="#">menu2
</a>

<div class="dropdown-menu">
<a href="#" class="dropdown-item">sub1</a>
<a href="#" class="dropdown-item">sub2</a>
</div>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" href="#">menu3
</a>

<div class="dropdown-menu">
<a href="#" class="dropdown-item">sub1</a>
<a href="#" class="dropdown-item">sub2</a>
<a href="#" class="dropdown-item">sub3</a>
</div>
</li>
</ul>
</div>

</nav>
</div>

</div>