How to fix Collapsing Navbar Collapse in Bootstrap ?

Last Updated : 30 Apr, 2024

To fix the collapsing Navbar Collapse in Bootstrap, ensure correct usage of data attributes, particularly data-bs-toggle and data-bs-target, consistent with Bootstrap 5 documentation. Debug any attribute errors to ensure smooth functionality of the collapsing navigation bar.

Incorrect Data Attributes

Check the data-bs-toggle and data-bs-target attributes on the toggler button (navbar-toggler) and the collapsible content (navbar-collapse). These attributes should match to ensure proper toggling of the collapse behavior.
Verify that the data-bs-target attribute points to the correct ID of the collapsible content.

Example: Implementation of Navbar Collapse in Bootstrap 5 with incorrect use of Data Attributes.

HTML

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport"
        content="width=device-width, initial-scale=1.0">
    <title>Fixed Collapsing Navbar in Bootstrap 5</title>
    <link rel="stylesheet" 
          href=
"https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" >
    <script src=
"https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js">
    </script>
</head>

<body>
    <nav class="navbar navbar-expand-lg 
                navbar-light bg-white">
        <div class="container">
            <a class="navbar-brand bg-white"
            href=
"https://www.geeksforgeeks.org/">
                <img src=
"https://media.geeksforgeeks.org/gfg-gg-logo.svg"
                    class="rounded float-start">
            </a>

            <!-- Toggler button for small screens -->
            <button class="navbar-toggler" 
                    type="button"
                    aria-controls="navbarSdCt" 
                    aria-expanded="false"
                    data-bs-toggle="collapse" 
                    data-bs-target="#navbarCt"
                    aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>

            <!-- Collapsible content -->
            <div class="collapse navbar-collapse" id="navbarSdCt">
                <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                    <li class="nav-item">
                        <a class="nav-link active text-success"
                        aria-current="page" href="#">
                            Home
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link text-success" href="#">
                            About Us
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link text-success" href="#">
                            Contact Us
                        </a>
                    </li>
                </ul>
                <form class="d-flex">
                    <input class="form-control me-2" 
                           type="search"
                           placeholder="Search" 
                           aria-label="Search">
                    <button class="btn btn-outline-success" 
                            type="submit">
                        Search
                    </button>
                </form>
            </div>
        </div>
    </nav>
    <h1 class="my-4">
        Navbar Collapse with incorrect
        use of Data Attributes.
    </h1>
</body>

</html>

Output:

fix-Collapsing-Navbar-Collapse-in-Bootstrap3

fix Collapsing Navbar Collapse in Bootstrap Example Output

Correct Data Attributes

The attribute data-bs-target should point to the correct id of the collapsible content.

Example: Implementation of Navbar Collapse in Bootstrap 5 with correct use of Data Attributes.

HTML

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport"
        content="width=device-width, initial-scale=1.0">
    <title>Fixed Collapsing Navbar in Bootstrap 5</title>
    <link href=
"https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" 
          rel="stylesheet">
    <script src=
"https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js">
    </script>
</head>

<body>
    <nav class="navbar navbar-expand-lg navbar-light bg-white">
        <div class="container">
            <a class="navbar-brand bg-white"
            href="https://www.geeksforgeeks.org/">
                <img src=
"https://media.geeksforgeeks.org/gfg-gg-logo.svg"
                    class="rounded float-start">
            </a>

            <!-- Toggler button for small screens -->
            <button class="navbar-toggler"
                    type="button" data-bs-toggle="collapse"
                    data-bs-target="#navbarSdCt"
                    aria-controls="navbarSdCt"
                    aria-expanded="false"
                    aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>

            <!-- Collapsible content -->
            <div class="collapse navbar-collapse"
                id="navbarSdCt">
                <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                    <li class="nav-item">
                        <a class="nav-link active text-success"
                        aria-current="page" href="#">
                            Home
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link text-success" href="#">
                            About Us
                        </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link text-success" href="#">
                            Contact Us
                        </a>
                    </li>
                </ul>
                <form class="d-flex">
                    <input class="form-control me-2" 
                           type="search"
                           placeholder="Search" 
                           aria-label="Search">
                    <button class="btn btn-outline-success"
                            type="submit">
                        Search
                    </button>
                </form>
            </div>
        </div>
    </nav>
</body>

</html>