The dropdown menu's subcategories are not functioning properly within the navigation system

Question

The dropdown menu's subcategories are not functioning properly within the navigation system

I am experiencing an issue with my navigation menu. The 'News' link works correctly, but when I try to access the dropdown menus for "Bulgaria" and "International", they do not appear as expected. Despite having the same code structure, there seems to be no apparent reason for their malfunction.

Below is the code snippet for my navigation bar:

<nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
            <div class="container-fluid">
                <a class="navbar-brand" asp-area="" asp-controller="Home" asp-action="Index">NewsWebsite</a>
                <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
                        aria-expanded="false" aria-label="Toggle navigation">
                    <span class="navbar-toggler-icon"></span>
                </button>
                <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
                    <ul class="navbar-nav mr-auto">
                        <li class="nav-item dropdown">
                            <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink-News" role="button" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                News
                            </a>
                            <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink-News">
                                <a class="dropdown-item dropdown-toggle" href="#" id="navbarDropdownMenuLink-Bulgaria" role="button" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                    Bulgaria
                                </a>
                                <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink-Bulgaria">
                                    <a class="dropdown-item" href="#">Dunavmost</a>
                                    <a class="dropdown-item" href="#">Petel</a>
                                </div>
                                <a class="dropdown-item dropdown-toggle" href="#" id="navbarDropdownMenuLink-International" role="button" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                    International
                                </a>
                                <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink-International">
                                    <a class="dropdown-item" href="#">NY Times</a>
                                    <a class="dropdown-item" href="#">DragonFire</a>
                                </div>
                            </div>
                        </li>
                    </ul>
                    <partial name="_LoginPartial" />
                </div>
            </div>
        </nav>

html css twitter-bootstrap

Answer 1

Answer №1

One limitation of Bootstrap is its lack of support for nested/inner dropdowns. The current issue is that when clicking on a nested dropdown, it inadvertently closes the outer dropdown.

To work around this limitation, you can still create nested dropdowns by incorporating some JQuery and leveraging Bootstrap's JS methods. Here's how I managed to implement it:

HTML

I wrapped each inner dropdown in a container with the

<div class="dropdown-submenu">

class. This allows us to target them later using JQuery. For the inner dropdown itself, you can utilize Bootstrap's .dropdown-menu classes as usual, ensuring to include a tab-index attribute for keyboard accessibility.

JQuery

You can make use of Bootstrap's dropdown methods by following this resource.

When a user clicks on a .dropdown-toggle element within a .dropdown-submenu, a specific function is triggered:

$('.dropdown-submenu a.dropdown-toggle').on("click", function(e) { ... }

Within this function, we first select all inner dropdowns within the dropdown submenu except the one clicked, and remove the 'show' class to close them. This prevents any overlapping dropdown issues:

$('.dropdown-submenu .dropdown-menu').not($(this).next('.dropdown-menu')).removeClass('show');

Subsequently, we toggle the 'show' class on the clicked submenu dropdown:

$(this).next('.dropdown-menu').toggleClass('show');

Finally, adding e.stopPropagation(); ensures that the outer dropdown doesn't close unintentionally.

Implementation

Ensure to include JQuery in your <head> section, similar to how the Jquery script is included at the start of the HTML portion provided in the snippet.

Working example:

You can refer to the code snippet below for an example with comments indicating the necessary steps to achieve nested dropdown functionality.

Answer 2

One limitation of Bootstrap is its lack of support for nested/inner dropdowns. The current issue is that when clicking on a nested dropdown, it inadvertently closes the outer dropdown.

To work around this limitation, you can still create nested dropdowns by incorporating some JQuery and leveraging Bootstrap's JS methods. Here's how I managed to implement it:

HTML

I wrapped each inner dropdown in a container with the

<div class="dropdown-submenu">

class. This allows us to target them later using JQuery. For the inner dropdown itself, you can utilize Bootstrap's .dropdown-menu classes as usual, ensuring to include a tab-index attribute for keyboard accessibility.

JQuery

You can make use of Bootstrap's dropdown methods by following this resource.

When a user clicks on a .dropdown-toggle element within a .dropdown-submenu, a specific function is triggered:

$('.dropdown-submenu a.dropdown-toggle').on("click", function(e) { ... }

Within this function, we first select all inner dropdowns within the dropdown submenu except the one clicked, and remove the 'show' class to close them. This prevents any overlapping dropdown issues:

$('.dropdown-submenu .dropdown-menu').not($(this).next('.dropdown-menu')).removeClass('show');

Subsequently, we toggle the 'show' class on the clicked submenu dropdown:

$(this).next('.dropdown-menu').toggleClass('show');

Finally, adding e.stopPropagation(); ensures that the outer dropdown doesn't close unintentionally.

Implementation

Ensure to include JQuery in your <head> section, similar to how the Jquery script is included at the start of the HTML portion provided in the snippet.

Working example:

You can refer to the code snippet below for an example with comments indicating the necessary steps to achieve nested dropdown functionality.

The dropdown menu's subcategories are not functioning properly within the navigation system

Answer №1

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