What could be the reason for my Bootstrap collapse navigation bar not functioning properly?

<!DOCTYPE html>
<html lang="en">
  <head>
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
    <!-- Optional theme -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
  </head>

  <body data-spy="scroll" data-target="#my-navbar">

    <!--Start of the navbar section-->
    <nav id="my-navbar" class="navbar navbar-default navbar-fixed-top">
      <div class="container">

        <div class="navbar-header">
          <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse">
            <span class="glyphicon glyphicon-align-justify"></span>
          </button>

          <div class="navbar-brand">Lorem Ipsum</div>
        </div>

        <div id="navbar-collapse" class="collapse navbar-collapse">
          <ul class="nav navbar-nav">
            <li><a href="#">Lorem Ipsum</a></li>
            <li><a href="#">Lorem Ipsum</a></li>
          </ul>
          <ul class="nav navbar-nav navbar-right">
            <li><a href="#">Lorem Ipsum</a></li>
          </ul>
        </div>
      </div>
    </nav>
    <!--End of the navbar section-->
  </body>
</html>

I have verified the code, checked the bootstrap documentation thoroughly, but encountered an issue where the collapse button does not function as expected when viewed on a mobile device. Any suggestions or insights would be appreciated!

htmlcsstwitter-bootstrap

Answer №1

After fixing the missing body tag by replacing it with a div, everything is now working perfectly. You can see the updated code in action here: 

<!DOCTYPE html>
<html lang="en">
  <head>
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
    <!-- Optional theme -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
  </head>
<div data-spy="scroll" data-target="#my-navbar">

    <!--Start of the navbar section-->
    <nav id="my-navbar" class="navbar navbar-default navbar-fixed-top">
      <div class="container">

        <div class="navbar-header">      
          <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse">
            <span class="glyphicon glyphicon-align-justify"></span>
          </button>

          <div class="navbar-brand">Lorem Ipsum</div>
        </div>

        <div id="navbar-collapse" class="collapse navbar-collapse">
          <ul class="nav navbar-nav">
            <li><a href="#">Lorem Ipsum</a></li>
            <li><a href="#">Lorem Ipsum</a></li>
          </ul>
          <ul class="nav navbar-nav navbar-right">
            <li><a href="#">Lorem Ipsum</a></li>
          </ul>
        </div>
      </div>
    </nav>
    <!--End of the navbar section-->
  </div>
 </body>

Answer №2

Don't forget to include the viewport meta tag in your HTML document. Make sure it's within the <head> section:

<meta name="viewport" content="width=device-width, initial-scale=1" />

Additionally, you need to add the bootstrap-responsive.css file:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-responsive.css.min.css" />

Check out the desired output here:

Answer №3

To implement the Bootstrap framework, you must include the following code within your <head> tag according to the official Bootstrap getting started guide:

<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<!-- Latest compiled and minified JavaScript -->
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>

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