I added a glyphicon in one of the middle rows below some text. Later they should provide a button for interacting with the postings. But then they just didn't display. To test if they don't display in general i added another one in the left row, where it worked, but why?
Code:
<body>
<div id="navbar">
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="#">Sample</a>
</div>
<ul class="nav navbar-nav">
<li class="active">
<a href="#">Home</a>
</li>
<li>
<a href="#">My Profile</a>
</li>
<li>
<a href="#">Sample Text</a>
</li>
<li>
<a href="#">Sample Text</a>
</li>
</ul>
</div>
</nav>
</div>
<div class="row">
<div class="col-sm-4">
<div>
<p>It is working here: </p>
<span class="glyphicon glyphicon-envelope">
</div>
</div>
<div class="col-sm-4">
<div class="well">
<div class="form-group">
<input id="tweetInput" type="text" class="form-control" id="usr" placeholder="Whazzup?">
<button id="tweetButton" type="button" class="btn btn-primary"> Primary </button>
</div>
</div>
<div class="well">
<div>
<h3>Lukas
<small>vor 5 Minuten</small>
</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit Ut enim ad minim veniam, quis nostrud exercitation
ullamco laboris... </p>
</div>
<div>
But not here!?
<span class="glyphicons glyphicons-envelope"></span>
<span class="glyphicons glyphicons-envelope"></span>
</div>
</div>
<div class="well">
<h3>John
<small>vor 7 Minuten</small>
</h3>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit Ut enim ad minim veniam, quis nostrud exercitation
ullamco laboris... </p>
</div>
<div class="well">
<div class="col-sm-4">.col-sm-4</div>
</div>
</body>