导航栏打开，但不关闭

Question

我的菜单可以打开，但点击关闭时没什么好开心的。有什么想法吗？

HTML：  

    <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#main-navbar">

        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        </button>
        <a href="/polls/" class="navbar-brand">
        <i class="fa fa-home" data-animation="tada"></i> Poll App
        </a>
    </div>

    <div class="collapse navbar-collapse" id="main-navbar">
        <ul class="nav navbar-nav navbar-right">
            <li><a href="/">Alle apper</a></li>
            <li><a href="/admin/">Admin</a></li>
        </ul>
    </div>

</div>

JAVASCRIPT： http://hannisdal.com

/static/polls/jquery-core-1.12.4/jquery-1.12.4.min.js
/static/polls/bootstrap-3.3.7/js/bootstrap.min.js
/static/polls/angle/js/packages.min.js
/static/polls/angle/js/theme.min.js"