My html bootstrap sidebar item just won't drop down - html

Currently trying to create a simple dropdown sidebar using bootstrap.
Below is my code in html:
<html>
<head>
<title>Sidebar</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link type="text/css" rel="stylesheet" href="bootstrap.css">
<link type="text/css" rel="stylesheet" href="common.css"/>
</head>
<body>
<div class="col-sm-3">
<ul class="nav nav-sidebar">
<li class="row">Item 1
<ul class="dropdown-menu">
<li>Item 1A</li>
<li>Item 1B</li>
<li>Item 1C</li>
</ul>
</li>
<li class="row">Item 2
<ul class="dropdown-menu">
<li>Item 2A</li>
<li>Item 2B</li>
</ul>
</li>
</ul>
</div>
</body>
Here is my common.css:
.row{
background-color:#ffff99;
border:2px solid black;
}
The sidebar won't drop down when I click Item 1 or Item 2. Any idea what went wrong?


Have a look at the basic template on the Bootstrap site
http://getbootstrap.com/getting-started/#template
At the bottom of the HTML block they have referenced two javascript files which you are missing.


You need to include the jquery.js and bootstrap.js.


The dropdowns work with JavaScript, so you need to include that. Try to add bootstrap.min.js to your application by adding
<script src="bootstrap.min.js" type="text/javascript"></script>
to the head section of your page, or just before the closing </body>-tag of the page.
Additionally, you need to add jQuery, which is done the same way, but make sure you include it before the bootstrap script.


Your dropdowns work with JavaScript
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<style>
.row {
background-color: #ffff99;
border: 2px solid black;
}
</style>
</head>
<body>
<div class="col-sm-3">
<ul class="nav nav-sidebar">
<li class="row">
Item 1
<ul class="dropdown-menu">
<li>Item 1A</li>
<li>Item 1B</li>
<li>Item 1C</li>
</ul>
</li>
<li class="row">
Item 2
<ul class="dropdown-menu">
<li>Item 2A</li>
<li>Item 2B</li>
</ul>
</li>
</ul>
</div>
</body>
</html>

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See below snippet.
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Is it possible add icon in bootstrap nav tabs like below picture.
I want to add number icon in nav tabs.

Working demo
You would do this with a badge,
<li class="active">Home<span class="badge">140</span></li>
and a little bit of CSS
.nav-tabs .badge{
position: absolute;
top: -10px;
right: -10px;
background: red;
}

Insert your badge and position is relative to the container like this:
.count-badge {
position: relative;
top: -50px;
right: -50px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" integrity="sha512-dTfge/zgoMYpP7QbHy4gWMEGsbsdZeCXz7irItjcC3sPUFtf0kuFbDz/ixG7ArTxmDjLXDmezHubeNikyKGVyQ==" crossorigin="anonymous">
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</li>
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</li>
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Yes, this is possible in multiple ways. Bootstrap has badges that would be an elegant solution.
<span class="badge">140</span>