Bootstrap NavBar css无法正常工作

Question

我在我的角度app.component.html中使用了一个bootstrap导航栏，但是，css无法正常工作：

<nav class="navbar navbar-toggleable-md navbar-light bg-faded header main-header">
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>
    <div class="navbar-brand headerTitle" >MerchantEdge</div>
    <div class="collapse navbar-collapse justify-content-end" id="navbarNavDropdown">
        <ul class="navbar-nav">
            <li class="nav-item">
                <a class="nav-link rightside-header" href="#">Aquirer Login</a>
            </li>
            <li class="nav-item">
                <a class="nav-link rightside-header" href="#">Merchant Login</a>
            </li>
        </ul>
    </div>
</nav>

Answer 1

这不是最新Bootstrap 4的correct Navbar markup。

navbar-toggleable-md应为navbar-expand-md

bg-faded应为bg-light

不再有navbar-toggler-right类