The Bootstrap navigation bar is having issues toggling

As someone new to Bootstrap, I am seeking the guidance of experienced individuals to help me identify where I may be going wrong.

My goal: I am currently developing a responsive website using Bootstrap. I want my navbar to remain fixed at the top and, when the webpage is viewed on a mobile device, I want the menu items to appear when clicked.

The issue: When viewing the website on a mobile browser, the navbar does not display any menu items when clicked. There is no toggle functionality.

What I have attempted: I have looked through various StackOverflow threads and comments where users recommended ensuring that the "data-toggle" attribute matches the id selector after the "collapse navbar-collapse" class.

I have confirmed that these match up correctly. "myNavbar" is indeed an id selector, but the proposed solution did not resolve the issue.

<div class="container-fluid" id="contentsOfMenu">

  <div class="navbar-header page-scroll">

    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
      <span class="sr-only">Toggle navigation</span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span> 
    </button>
    
    <div class"page-scroll">
      <a href="#welcome" id="brandLabel"><img src="images/brainFishIconMenu.png"/></a>
      <a class="navbar-brand" href="#welcome" >BrainFish</a>
    </div>

  </div><!--end of navbar-header--------------------------->

  <div class="collapse navbar-collapse" id="myNavbar">

    <ul class="nav navbar-nav navbar-right" id="navLinkColor">
      <li class="page-scroll"><a href="#aboutUs">About</a></li>
      <li class="page-scroll"><a href="#services">Services</a></li> 
      <li class="page-scroll"><a href="#approach">Approach</a></li> 
      <li class="page-scroll"><a href="#contact">Contact</a></li>          
    </ul>

  </div><!--end of myNavBar-->

</div><!--end of contentsOfMenu--------------------->

Answer №1

To ensure proper functionality, it is important to correctly add the CDNs for collapsing and toggling.

The recommended order for adding Bootstrap 4 CDN is as follows:

  1. jQuery
  2. Popper.js
  3. Bootstrap JS

Additionally, a sample template following Bootstrap 4 specifications should be used:

<!DOCTYPE html>

<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Kulkarni Book-Stall</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<body>
     <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
        
    <nav class="navbar navbar-expand-lg navbar-light bg-light">
                <a class="navbar-brand" href="#">Navbar</a>
                <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
                  <span class="navbar-toggler-icon"></span>
                </button>
              
                <div class="collapse navbar-collapse" id="navbarTogglerDemo02">
                  <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
                    <li class="nav-item active">
                      <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
                    </li>
                    <li class="nav-item">
                      <a class="nav-link" href="#">Link</a>
                    </li>
                    <li class="nav-item">
                      <a class="nav-link disabled" href="#">Disabled</a>
                    </li>
                  </ul>
                  <form class="form-inline my-2 my-lg-0">
                    <input class="form-control mr-sm-2" type="search" placeholder="Search">
                    <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
                  </form>
                </div>
     </nav>
</body>
</html>

Answer №2

To start, double check that you have included bootstrap.js immediately after the jquery script tag. Also, ensure that your navbar markup is correct. Here is an example:

<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
<script src="path/to/bootstrap.js" type="text/javascript"></script><!--required for navbar toggle--> 

Additionally, review the following navbar code snippet:

<div class="navbar navbar-inverse navbar-static-top navbar-topic">
    <div class="container">
        <div class="navbar-header"><!--navbar start-->
            <a  href="#"  class="navbar-brand"><!--Logo -->
                your site
            </a>
            <button class="navbar-toggle" data-toggle="collapse" data-target=".navHeaderCollapse">
                <span class="icon-bar"></span><!--4 icon-bar spans create the dropdown menu-->
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
        </div>
        
        <div class="collapse navbar-collapse navHeaderCollapse">
            <ul class="nav navbar-nav navbar-right">
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">More things <b class="caret"></b></a>
                    <ul class="dropdown-menu">
                        <li><a href="/html/webdesign/html.php">Html</a></li>
                        <li><a href="">Link</a></li>
                        <li><a href="">Link 2</a></li>
                        <li><a href="">Link 3</a></li>
                    </ul>
                </li>
                <li><a href="">Links</a></li>
                <li><a href="">Contact</a></li>
            </ul>
        </div>
    </div>
</div>    

Answer №3

If the menu foldout in your website isn't working, it could be due to missing the javascript component of bootstrap. Alternatively, a Javascript exception may have occurred. To troubleshoot, you can inspect your browsers debugging console for any errors.

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