Bootstrap Nav Bar下拉菜单点击、悬停均无法触发展开问题求助

问题根因 #

• 所用Bootstrap 5版本已将所有交互类自定义属性调整为data-bs-*命名空间，原代码中仍使用Bootstrap 4的data-toggle、data-target属性，属性不匹配无法触发交互逻辑
• 仅引入Bootstrap CSS文件，未引入Bootstrap JS依赖，下拉菜单等交互组件的触发逻辑完全依赖对应JS代码实现
• 样式类不匹配：Bootstrap 5已将原右外边距类mr-auto调整为me-auto

修正后可运行代码 #

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

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./style.css">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css">
    <!-- 引入Bootstrap 5 内置Popper的完整JS包 -->
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js"></script>
    <title>Document</title>
</head>

<body>
    <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo01"
            aria-controls="navbarTogglerDemo01" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse" id="navbarTogglerDemo01">
            <ul class="navbar-nav me-auto">
                <li class="nav-item">
                    <a class="nav-link" activeClass="active">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" activeClass="active">Link</a>
                </li>
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" activeClass="active" id="navbarDropdown" role="button"
                        data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                        Dropdown
                    </a>
                    <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                        <a class="dropdown-item" activeClass="active">Action</a>
                        <a class="dropdown-item" activeClass="active">Another action</a>
                        <div class="dropdown-divider"></div>
                        <a class="dropdown-item" activeClass="active">Something else here</a>
                    </div>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" activeClass="active">Disabled</a>
                </li>
            </ul>
        </div>
    </nav>
</body>

</html>

内容的提问来源于stack exchange，提问作者Wayne