响应式下拉答案

【问题标题】：Responsive dropdown响应式下拉
【发布时间】：2023-01-09 15:46:03
【问题描述】：

我使用 CSS 创建了一个下拉列表。当悬停导航栏的元素时，会弹出下拉菜单。代码中没有错误。但是，我需要有关导航栏样式的帮助。我希望子菜单中的所有元素都在同一行，即，我希望下拉菜单的元素处于同一位置，同时根据悬停在导航栏中的元素更改信息。参考可以在 lululemon 网站上下拉。

nav {
  display: inline-flex;
  width: 100%;
}

.nav-list {
  display: flex;
  width: 100%;
  margin-top: .7rem;
  padding-left: 1.1rem;
}

.nav-list li {
  position: relative;
}

.nav-list>li>a {
  color: black;
  display: block;
  font-size: 1rem;
  padding: 1.3rem 1rem;
  text-transform: uppercase;
  transition: color 300ms;
}

.sub-menu a {
  position: relative;
  top: 2rem;
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 200;
  padding: 0 40px 0 40px;
}

.sub-menu {
  display: flex;
  position: absolute;
  box-sizing: border-box;
  background-color: black;
  visibility: hidden;
  box-sizing: border-box;
  width: 50rem;
  height: 15rem;
}

.nav-list li:hover>.sub-menu {
  top: 3.85em;
  visibility: visible;
  opacity: 1;
}

<nav>
  <ul class="nav-list">
    <li>
      <a href="">Men</a>
      <ul class="sub-menu">
        <li>
          <a href="#">Mens shirts</a>
        </li>
        <li>
          <a href="#">Mens Shorts</a>
        </li>
        <li>
          <a href="#">Mens Accessories</a>
        </li>
      </ul>
    </li>
    <li>
      <a href="%">Women</a>
      <ul class="sub-menu">
        <li>
          <a href="#">Womens shirts</a>
        </li>
        <li>
          <a href="#">Womens Shorts</a>
        </li>
        <li>
          <a href="#">Womens Accessories </a>
        </li>

      </ul>
</nav>

【问题讨论】：

标签： html css

【解决方案1】：

nav {
  display: inline-flex;
  width: 100%;
}

.nav-list {
  display: flex;
  width: 100%;
  margin-top: .7rem;
  padding-left: 1.1rem;
  position: relative;
}

.nav-list li {
  position: relative;
}

.nav-list>li>a {
  color: black;
  display: block;
  font-size: 1rem;
  padding: 1.3rem 1rem;
  text-transform: uppercase;
  transition: color 300ms;
}

.sub-menu a {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 200;
  padding: 0 40px 0 40px;
}

.sub-menu {
  display: flex;
  position: fixed;
  box-sizing: border-box;
  background-color: black;
  visibility: hidden;
  width: 50rem;
  height: 15rem;
  left: 20px;
  top: 0;
}

.nav-list li:hover>.sub-menu {
  top: 3.85em;
  visibility: visible;
  opacity: 1;
}

<nav>
  <ul class="nav-list">
    <li>
      <a href="">Men</a>
      <ul class="sub-menu">
        <li>
          <a href="#">Mens shirts</a>
        </li>
        <li>
          <a href="#">Mens Shorts</a>
        </li>
        <li>
          <a href="#">Mens Accessories</a>
        </li>
      </ul>
    </li>
    <li>
      <a href="%">Women</a>
      <ul class="sub-menu">
        <li>
          <a href="#">Womens shirts</a>
        </li>
        <li>
          <a href="#">Womens Shorts</a>
        </li>
        <li>
          <a href="#">Womens Accessories </a>
        </li>

      </ul>
</nav>

我对您的代码做了一些更改...基本上 position: fixed 完成了这项工作。您可以根据需要设置left值。

【讨论】：

【解决方案2】：

这是你需要的吗？问题是 position:relative 放错了地方，它必须应用于 .nav-list，因为它是 .sub-menu 的父级，您需要根据它对齐。

nav {
  display: inline-flex;
  width: 100%;
}

.nav-list {
  display: flex;
  position:relative;
  width: 100%;
  margin-top: .7rem;
  padding-left: 1.1rem;
}

.nav-list>li>a {
  color: black;
  display: block;
  font-size: 1rem;
  padding: 1.3rem 1rem;
  text-transform: uppercase;
  transition: color 300ms;
}

.sub-menu a {
  position: relative;
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 200;
  padding: 0 40px 0 40px;
}

.sub-menu {
  display: flex;
  align-items:center;
  position: absolute;
  left:0px;
  box-sizing: border-box;
  background-color: black;
  visibility: hidden;
  box-sizing: border-box;
  width: 50rem;
  height: fit-content;
}

.nav-list li:hover >.sub-menu {
  top: 3.85em;
  visibility: visible;
  opacity: 1;
}

【讨论】：