You can call $.collapse('hide');
with an event handler on the links.
$('.nav-link').on('click',function() {_x000D_
$('.navbar-collapse').collapse('hide');_x000D_
});
_x000D_
.navbar-toggler .icon-bar {_x000D_
margin: 7px;_x000D_
display: block;_x000D_
width: 22px;_x000D_
height: 1px;_x000D_
background-color: #cccccc;_x000D_
border-radius: 1px;_x000D_
}
_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>_x000D_
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
<nav class="navbar navbar-toggleable-md fixed-top">_x000D_
<button id="nav-btn" class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarDiv" aria-expanded="false" aria-label="Toggle navigation">_x000D_
<span class="icon-bar"></span>_x000D_
<span class="icon-bar"></span>_x000D_
<span class="icon-bar"></span>_x000D_
</button>_x000D_
<div class="container">_x000D_
<a class="navbar-brand" href="#"><img src="Images/logo.png" width="60px"></a>_x000D_
<div class="collapse navbar-collapse" id="navbarDiv">_x000D_
<ul class="navbar-nav mr-auto">_x000D_
<li class="nav-item active">_x000D_
<a class="nav-link" href="#home">Home <span class="sr-only">(current)</span></a>_x000D_
</li>_x000D_
<li class="nav-item">_x000D_
<a class="nav-link" href="#about-us">About</a>_x000D_
</li>_x000D_
<li class="nav-item">_x000D_
<a class="nav-link" href="#pricing">Pricing</a>_x000D_
</li>_x000D_
</ul>_x000D_
</div>_x000D_
</div>_x000D_
</nav>
_x000D_