"Search bar" 即使我使用 ''d-flex justify-content-end' 也不向右侧移动？

Question

谁能告诉我哪里出错了？我想将我的搜索栏移动到右侧的末尾。

  <nav class="navbar navbar-expand-lg navbar-dark bg-primary fixed-top">
    <div class="container">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" data-bs-toggle="collapse" data-bs-target="#expandme">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="expandme">
            <div class="navbar-nav">
                <a href="#Home" class="nav-item nav-link">Home</a>
                <a href="#About" class="nav-item nav-link">About</a>
                <a href="#Contact" class="nav-item nav-link">Contact</a>
            </div>
            <form class="d-flex justify-content-end">
                <input class="form-control me-2 " type="search" placeholder="Search" aria-label="Search">
                <button class="btn btn-outline-light" type="submit">Search</button>
            </form>
        </div>
    </div>
</nav>

Answer 1

将表单元素放在 id:expandme 之外，然后尝试使用“d-flex justify-content-end”

<!-- Bootstrap CSS -->
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" rel="stylesheet"/>
  
<nav class="navbar navbar-expand-lg navbar-dark bg-primary fixed-top">
    <div class="container">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" data-bs-toggle="collapse" data-bs-target="#expandme">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="expandme">
            <div class="navbar-nav">
                <a href="#Home" class="nav-item nav-link">Home</a>
                <a href="#About" class="nav-item nav-link">About</a>
                <a href="#Contact" class="nav-item nav-link">Contact</a>
            </div>
        </div>
        <form class="d-flex justify-content-end">
            <input class="form-control mx-2" type="search" placeholder="Search" aria-label="Search">
            <button class="btn btn-outline-light" type="submit">Search</button>
        </form>
    </div>
</nav>

"Search bar" 即使我使用 ''d-flex justify-content-end' 也不向右侧移动？

"Search bar" doesnt moving on right side even when i use ''d-flex justify-content-end"?

html

positioning

searchbar

flexbox

twitter-bootstrap