Bootstrap 3 nav dropdown

Question

I'm using navbar with a dropdown menu (Bootstrap 3)

1. I resize the browser window < 767px
2. I open the menu
3. I resize the browser window > 767px
4. I open the dropdown menu (inside navbar)

The issue: A scrollbar appears in the dropdown menu. (see picture below)

My "nav" element is relative position.

<nav class="navbar navbar-default clearfix" role="navigation">

    <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-main-collapse">
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </button>
        <a class="logo" href="#"></a>
    </div>

    <div class="collapse navbar-collapse navbar-main-collapse">
        <ul class="main-menu user hidden-xs">
            <li class="dropdown">
                <a href="#" class="dropdown-toggle btn btn-xs btn-primary" data-toggle="dropdown">
                    <span class="glyphicon glyphicon-user"></span>
                </a>
                <ul class="dropdown-menu pull-right" role="menu">
                    <li><a href="#">Menu item 1</a></li>
                    <li><a href="#">Menu item 2</a></li>
                    <li class="divider"></li>
                    <li><a href="#">Menu item 3</a></li>
                </ul>
            </li>
        </ul>
    </div>

</nav>

Does anyone know how to fix this issue?

Answer 1

Yes.. this is a known bug in Bootstrap 3.0.2 --

(https://github.com/twbs/bootstrap/issues/11243)

One workaround is to..

.navbar-collapse.in {
    overflow-y: visible;
}

Demo: http://bootply.com/96924

Answer 2

Skelly's answer helped. Thank you. But since I was seeing a scrollbar during the collapsing activity, I needed to fix it like this:

.navbar-collapse.in, .navbar-collapse.collapsing {
    overflow-y: visible;
}

Bootstrap applies the "collapsing" class as the menu collapses, then "in" once the collapse is complete. I hope this helps someone else.