How to find out if "navbar-toggle" button is collapsed or hidden with Javascript

Question

Is there a way to find out, with JS, if the toggle button menu is collapsed or hidden.

Does class="navbar-toggle" or data-toggle="collapse" have a parameter which indicates this state?

I know the events that are called when the ".collape" is shown or hidden:

$('.navbar-collapse').on('shown.bs.collapse', function () { //called when dropdown menu is shown });

Furthermore, I know the methods that shows or hides the collapse like this:

$('.navbar-collapse').collapse('hide'); 

But I can´t find any information on how to get the current status of .collapse, telling me if it´s hidden or shown.

Answer 1

(I am editing this answer with a better way.)

Yes, you can check if the element is visible, using jquery $(element).is(":visible")

Here is a live demo on jsFiddle

Here is some html

<nav class="navbar navbar-inverse">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">WebSiteName</a>
    </div>
    <div class="collapse navbar-collapse" id="myNavbar">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Home</a></li>
        <li class="dropdown">
          <a class="dropdown-toggle" data-toggle="dropdown" href="#">Page 1 <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">Page 1-1</a></li>
            <li><a href="#">Page 1-2</a></li>
            <li><a href="#">Page 1-3</a></li>
          </ul>
        </li>
        <li><a href="#">Page 2</a></li>
        <li><a href="#">Page 3</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
        <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
      </ul>
    </div>
  </div>
</nav>

<div class="container">
  <h3>Collapsible Navbar</h3>
  <p>In this example, the navigation bar is hidden on small screens and replaced by a button in the top right corner (try to re-size this window).
  <p>Only when the button is clicked, the navigation bar will be displayed.</p>
</div>
<input type="button" value="click me" onclick="clickedIt()" />

Here is some javascript

function clickedIt() {   
   var canSee = $("#myNavbar").is(":visible");
   alert(canSee);
}