我怎样才能让这个下拉菜单占据整个页面宽度？

问题描述 投票：0回答：1

我有这个 Bootstrap 5 megamenu，我想让所有下拉菜单与所有页面宽度一样长，并且都具有相同的位置。

赞本页。

如何使下拉菜单变大？
我需要修改哪个 Bootstrap 类？

我已经尝试过，但没有任何改变。我不知道为什么。

.navbar-nav {
  max-width: 950px;
  width: 80%;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.navbar a:hover {
  text-decoration: underline;
}

.dropdown-menu {
  font-size: 0.8rem;
  border: none;
  text-align: center;
  position: absolute;
  border-radius: 0;
  box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
  display: grid;
  grid-template-columns: auto auto auto auto auto;
  visibility: hidden;
  width: 1225px;
  z-index: 999;
}

#navbarSupportedContent {
  display: flex;
  justify-content: space-around;
}

.dropdown:hover .dropdown-menu {
  visibility: visible;
}

.dropdown-menu.show {
  display: flex;
}

.dropdown a:hover {
  color: darkgrey;
  text-decoration: none;
  background-color: white;
}

.dropdown-menu li:first-child a {
  color: darkgrey;
  padding: 20px 0;
}
<!-- Bootstrap-5 Dependencies -->
<script src="https://cdn.jsdelivr.net/npm/@popperjs/[email protected]/dist/umd/popper.min.js" integrity="sha384-I7E8VVD/ismYTF4hNIPjVp/Zjvgyol6VFvRkX/vR+Vc4jQkC+hVqc2pM8ODewa9r" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>


<!-- Body -->
<nav id="navbar_top" class="navbar navbar-expand-lg">
  <div class="container-fluid">
    <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 mb-2 mb-lg-0">
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="" role="button" aria-expanded="false">Lorem</a>
          <div class="dropdown-menu">
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
          </div>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="" role="button" aria-expanded="false">Lorem</a>
          <div class="dropdown-menu">
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
          </div>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="" role="button" aria-expanded="false">Lorem</a>
          <div class="dropdown-menu">
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
          </div>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="" role="button" aria-expanded="false">Lorem</a>
          <div class="dropdown-menu">
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
          </div>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="" role="button" aria-expanded="false">Lorem</a>
          <div class="dropdown-menu">
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
            <ul>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
              <li><a class="dropdown-item" href="">Lorem Ipsum</a></li>
            </ul>
          </div>
        </li>
      </ul>
    </div>
  </div>
</nav>

html css bootstrap-5 navbar
1个回答
0
投票

你可以这样做：

https://jsfiddle.net/SaoudiH/u9bpryzo/7/

您需要添加这两个类：

.navbar .has-megamenu{position:static!important;}
.navbar .megamenu{left:0; right:0; width:100%; margin-top:0;  }

将 megamenu 应用于下拉菜单元素，并将 has-megamenu 应用于其父元素。

示例：

<li class="nav-item dropdown has-megamenu">
                            <a class="nav-link dropdown-toggle" href="#" role="button" aria-expanded="false">Lorem</a>
                            <div class="dropdown-menu megamenu">

检查此资源： https://bootstrap-menu.com/detail-megamenu.html

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