The Bootstrap dropdown menu fails to expand when clicked

I'm having trouble getting this dropdown menu to work. I've tried everything and can't seem to find a solution. It just stays still and doesn't drop down. Can someone please lend me some assistance?

<div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
                <a class="nav-link" href="index.html">Home<span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">About Me?</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Exercise 1</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Exercise 2</a>
            </li>
            <li class="nav-item dropdown">
               <button class="btn nav-item dropdown-toggle" id="dropdownMenuButton" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                   Dropdown
               </button>
               <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                   <a class="dropdown-item" href="#">Action</a>
                   <a class="dropdown-item" href="#">Another action</a>
                   <a class="dropdown-item" href="#">Something else here</a>
                </div>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Exercise 3</a>
            </li>
        </ul>
        <form class="form-inline my-2 my-lg-0">
            <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
            <button class="btn btn-outline-primary my-2 my-sm-0" type="submit">Search</button>
        </form>
    </div>

EDIT: Here's the header code, as many of you have been asking for the links

<head>
    <meta charset="UTF-8">
    <link href="styles.css" type="text/css" rel="stylesheet">
    <title>Ana Rodrigues</title>
    <link rel="stylesheet" href="css/bootstrap.css">
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <link rel="stylesheet" href="css/bootstrap-grid.css">
    <link rel="stylesheet" href="css/bootstrap-grid.min.css">
    <link rel="stylesheet" href="css/bootstrap-reboot.css">
    <link rel="stylesheet" href="css/bootstrap-reboot.min.css">
    <link href="https://fonts.googleapis.com/css?family=Oswald" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css?family=Just+Another+Hand" rel="stylesheet">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
htmlcssdrop-down-menubootstrap-4

Answer №1

Check out this link for a solution to the issue: https://getbootstrap.com/docs/4.0/components/dropdowns/
Make sure to include bootstrap in your header or you may have overlooked downloading the bootstrap files before implementing your code. Additionally, internet connection is necessary if you are using it in the header.

Answer №2

Have you included the Bootstrap JS & jQuery in your project?

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://getbootstrap.com/docs/4.0/dist/js/bootstrap.min.js"></script>

Answer №3

Ensure all necessary Javascript files are included to enable proper functionality of your bootstrap components, as mentioned by @saeed. In the provided link, you will find the following information:

"Dropdowns rely on a third-party library called Popper.js for dynamic positioning and viewport detection. Make sure to include popper.min.js before Bootstrap’s JavaScript file or utilize bootstrap.bundle.min.js / bootstrap.bundle.js which includes Popper.js. It's important to note that Popper.js is not used for dropdown positioning in navbars because dynamic positioning is not needed.

If you are compiling our JavaScript from source, util.js is required."

Edit:

Don't forget to include the jquery JS file!

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