引導程序 5：下拉菜單 go 位於屏幕右側

Question

我有一個默認的 bootstrap 5 導航欄，但是當我嘗試在右側放置一個下拉菜單時，下拉項目列表會從右側的屏幕中消失。 這個https://ibb.co/jf3GHfK 。

我已經嘗試過給其他人的解決方案，例如這里： Bootstrap 4: Dropdown menu is going off to the right to the screen

在這里： 引導程序：Position 的下拉菜單相對於導航欄項

（我嘗試過下拉菜單右或右拉，但沒有什么對我有用....）

這是效果不佳的地方：

<ul class="navbar-nav ml-auto">
  <li class="nav-item dropdown">
    <a
      class="nav-link dropdown-toggle"
      href="#"
      id="navbarDropdown"
      role="button"
      data-bs-toggle="dropdown"
      aria-expanded="false"
    >
      Username
    </a>

    <div
      class="dropdown-menu dropdown-menu-right"
      aria-labelledby="navbarDropdown"
    >
      <a class="dropdown-item dropdown" href="#"> Edit settings </a>
      <a class="dropdown-item" href="#"> Edit profile page </a>
      <a class="dropdown-item" href="#"> Show profile page </a>
      <a class="dropdown-item" href="#"> Create profile page </a>
    </div>
  </li>
</ul>

這是我的導航欄代碼：

<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<div class="container-fluid">
<a class="navbar-brand" href="#">Blog</a>
<button
  class="navbar-toggler"
  type="button"
  data-bs-toggle="collapse"
  data-bs-target="#navbarSupportedContent"
  aria-controls="navbarSupportedContent"
  aria-expanded="false"
  aria-label="Toggle navigation"
>
  <span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
  <ul class="navbar-nav me-auto mb-2 mb-lg-0">
    <li class="nav-item dropdown">
      <a
        class="nav-link dropdown-toggle"
        href="#"
        id="navbarDropdown"
        role="button"
        data-bs-toggle="dropdown"
        aria-expanded="false"
      >
        Categories
      </a>

      <ul class="dropdown-menu" aria-labelledby="navbarDropdown">
        <li>
          <a class="dropdown-item" href="#">Cat1</a>
        </li>
        <li>
          <a class="dropdown-item" href="#">Cat2</a>
        </li>
        <li>
          <a class="dropdown-item" href="#">Cat3</a>
        </li>
      </ul>
    </li>

    <li class="nav-item">
      <a class="nav-link" href="#">Add post</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#">Add category</a>
    </li>

    <li class="nav-item">
      <a class="nav-link" href="#">Logout</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#">Sign in</a>
    </li>
  </ul>
</div>

<!-- This is what is not working well -->
<ul class="navbar-nav ml-auto">
  <li class="nav-item dropdown">
    <a
      class="nav-link dropdown-toggle"
      href="#"
      id="navbarDropdown"
      role="button"
      data-bs-toggle="dropdown"
      aria-expanded="false"
    >
      {{ user.first_name }} {{ user.last_name }}
    </a>

    <div
      class="dropdown-menu dropdown-menu-right"
      aria-labelledby="navbarDropdown"
    >
      <a class="dropdown-item dropdown" href="#"> Edit settings </a>
      <a class="dropdown-item" href="#"> Edit profile page </a>
      <a class="dropdown-item" href="#"> Show profile page </a>
      <a class="dropdown-item" href="#"> Create profile page </a>
    </div>
  </li>
</ul>
<!-- ################################ -->

問候。

Answer 1

確保您正在閱讀您正在使用的版本的正確文檔：
https://getbootstrap.com/docs/5.0/components/dropdowns/#menu-alignment
您將看到 v5 使用.dropdown-menu-end作為右對齊菜單。

 <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous"> <nav class="navbar navbar-expand-lg navbar-dark bg-dark"> <div class="container-fluid"> <a class="navbar-brand" href="#">Blog</a> <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navbarSupportedContent"> <ul class="navbar-nav me-auto mb-2 mb-lg-0"> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false"> Categories </a> <ul class="dropdown-menu" aria-labelledby="navbarDropdown"> <li> <a class="dropdown-item" href="#">Cat1</a> </li> <li> <a class="dropdown-item" href="#">Cat2</a> </li> <li> <a class="dropdown-item" href="#">Cat3</a> </li> </ul> </li> <li class="nav-item"> <a class="nav-link" href="#">Add post</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Add category</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Logout</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Sign in</a> </li> </ul> </div> <:-- This is what is not working well --> <ul class="navbar-nav ml-auto"> <li class="nav-item"> <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false"> John Doe </a> <div class="dropdown-menu dropdown-menu-end" aria-labelledby="navbarDropdown"> <a class="dropdown-item dropdown" href="#"> Edit settings </a> <a class="dropdown-item" href="#"> Edit profile page </a> <a class="dropdown-item" href="#"> Show profile page </a> <a class="dropdown-item" href="#"> Create profile page </a> </div> </li> </ul> <script src="https.//cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/js/bootstrap.bundle.min.js" integrity="sha384-b5kHyXgcpbZJO/tY9Ul7kGkf1S0CWuKcCD38l8YkeH8z8QjE0GmW1gYU5S9FOnJ0" crossorigin="anonymous"></script>

Answer 2

以您的風格添加此 class。css

.dropdown-menu-right {
    right: 0 !important;
    left: auto !important;
}

在您的 div 中添加此下拉菜單右后。

我的也是這樣的:(