javascript - Navbar dropdown (collapse) is not working in Bootstrap 5

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javascript - Navbar dropdown (collapse) is not working in Bootstrap 5

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

javascript - Navbar dropdown (collapse) is not working in Bootstrap 5

I am facing a issue when trying to create a responsive menu or dropdown button with Bootstrap 5.Everything seems ok.The navigation icon & dropdown icon apears.But its not working.When I clicked the nav icon or dropdown button,no dropdown menu apears.

I want to specially mention that I also included the jquery file. But it didn't work. Can anyone please tell me what is happening here?

One last thing,I faced severel issues with some others bootstrap classes like mr-auto,ml-auto etc.Is it any bug or new classes come with bootstrap 5 for this kind of job?

Here is my code:

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Bootstrap</title>
        <link
            href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
            rel="stylesheet"
            integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1"
            crossorigin="anonymous"
        />
    </head>
    <body>
        <nav class="navbar navbar-dark bg-dark navbar-expand-md">
            <a href="#" class="navbar-brand">DemoTech</a>
            <button
                class="navbar-toggler"
                data-toggle="collapse"
                data-target="#navbar"
            >
                <span class="navbar-toggler-icon"></span>
            </button>

            <div class="navbar-collapse collapse" id="navbar" navbar>
                <ul class="navbar-nav">
                    <li class="nav-item"><a href="#" class="nav-link">Home</a></li>
                    <li class="nav-item"><a href="#" class="nav-link">About</a></li>
                    <li class="nav-item"><a href="#" class="nav-link">Contact</a></li>
                </ul>
            </div>
        </nav>

        <script
            src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"
            integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW"
            crossorigin="anonymous"
        ></script>
    </body>
</html>

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1 Reply

深蓝 · Answer 1 · 2021-10-16T22:26:35+0000

The data-* attributes used in Bootstrap 4 have been replaced with data-bs-* in Bootstrap 5

<button class="navbar-toggler" data-bs-toggle="collapse" data-bs-target="#navbar">
    <span class="navbar-toggler-icon"></span>
</button>

Demo

As explained in the docs, data attributes for all JavaScript plugins are now namespaced to help distinguish Bootstrap functionality from third parties and your own code. This mean any javascript components (Collapse, Navbar, Carousel, Dropdown, Tabs, Modal, etc..) will only work using data-bs-... attributes.

Bootstrap 5 is a major update with breaking changes. Also see here that ml-auto/mr-auto have changed to ms-auto/me-auto.

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javascript - Navbar dropdown (collapse) is not working in Bootstrap 5

javascript - Navbar dropdown (collapse) is not working in Bootstrap 5

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