html - 创建一个子菜单 html

Question

嘿，我对我的下拉菜单进行了相当多的设计，我在添加子菜单时遇到了麻烦，让我们说到下拉菜单 div 上的第一个元素。

我只希望子菜单从定义子菜单悬停的位置开始，然后向右并以与当前子菜单相同的方式下拉。这是我的 html:

    <nav>
          <div class="main-nav">
            <ul class="left">
              <li class="dropdown"><a href="#">Home</a>
                <div class="dropdown-content">
                  <a href="#">Third</a>
                  <a href="#">Third Link</a>
                  <a href="#">Third Link 3</a>
                </div>
              </li>
              <li><a href="#">Gods</a></li>
              <li><a href="#">Goddesses</a></li>
            </ul>
            <div class="play-now"></div>
            <ul class="right">
              <li><a href="#">Heroes</a></li>
              <li><a href="#">Myths</a></li>
              <li><a href="#">Beasts</a></li>
            </ul>
          </div>
        </nav>

这是全部的CSS:

nav {
    padding-left: 5px
}

nav .main-nav {
    height: 80px;
    width: 100%;
    margin-top: 64px;
    background: url(../images/navHeader.png) no-repeat top;
    position: relative
}

nav .main-nav ul {
    width: 360px;
    height: 80px;
    margin-top: 2px;
    padding: 0;
    list-style-type: none
}

nav .main-nav ul a,
nav .main-nav ul li {
    display: inline-block;
    width: 105px;
    line-height: 80px;
    height: 80px

}

nav .main-nav .dropdown-content a {
  height: auto;
  line-height: initial;
  padding: 3px 0;
}

nav .main-nav ul a {
    text-align: center;
    font-weight: 550;
    font-size: 12px;
    color: #84827d;
    text-shadow: 1px 1px 1px 1px #000;
    text-transform: uppercase;
    -webkit-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out
}

nav .main-nav ul a:hover {
    text-decoration: none;
    color: #7289da
}
nav .main-nav li .dropdown {

}
nav .main-nav .dropdown-content {
    position: absolute;
    display: none;
    float: left;
    z-index: 10;
    -webkit-box-shadow: 0 3px 5px 0 #999;
    -moz-box-shadow: 0 3px 5px 0 #999;
    box-shadow: 0 3px 5px 0 #999;
    border: 1px solid #CCC;
    background: #3A4FC5;
    color: #656161;
    opacity: .8;
    min-width: 30px;
    top: 60px;
}

nav .main-nav .dropdown-content a {
    color: black;
    text-decoration: none;
    display: block;
    text-align: center;
}
nav .main-nav .dropdown-content a:hover {
    background-color: #3A4FC5
}

nav .main-nav .dropdown:hover .dropdown-content {
    display: inline-block;
}

nav .main-nav ul.left {
    float: left;
    margin-left: 5px;
}

nav .main-nav ul.right {
    float: right;
    margin-left: 5px
}

这是片段，

nav {
    padding-left: 5px
}

nav .main-nav {
    height: 80px;
    width: 100%;
    margin-top: 64px;
    background: url(../images/navHeader.png) no-repeat top;
    position: relative
}

nav .main-nav ul {
    width: 360px;
    height: 80px;
    margin-top: 2px;
    padding: 0;
    list-style-type: none
}

nav .main-nav ul a,
nav .main-nav ul li {
    display: inline-block;
    width: 105px;
    line-height: 80px;
    height: 80px

}

nav .main-nav .dropdown-content a {
  height: auto;
  line-height: initial;
  padding: 3px 0;
}

nav .main-nav ul a {
    text-align: center;
    font-weight: 550;
    font-size: 12px;
    color: #84827d;
    text-shadow: 1px 1px 1px 1px #000;
    text-transform: uppercase;
    -webkit-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out
}

nav .main-nav ul a:hover {
    text-decoration: none;
    color: #7289da
}
nav .main-nav li .dropdown {

}
nav .main-nav .dropdown-content {
    position: absolute;
    display: none;
    float: left;
    z-index: 10;
    -webkit-box-shadow: 0 3px 5px 0 #999;
    -moz-box-shadow: 0 3px 5px 0 #999;
    box-shadow: 0 3px 5px 0 #999;
    border: 1px solid #CCC;
    background: #3A4FC5;
    color: #656161;
    opacity: .8;
    min-width: 30px;
    top: 60px;
}

nav .main-nav .dropdown-content a {
    color: black;
    text-decoration: none;
    display: block;
    text-align: center;
}
nav .main-nav .dropdown-content a:hover {
    background-color: #3A4FC5
}

nav .main-nav .dropdown:hover .dropdown-content {
    display: inline-block;
}

nav .main-nav ul.left {
    float: left;
    margin-left: 5px;
}

nav .main-nav ul.right {
    float: right;
    margin-left: 5px
}

<nav>
  <div class="main-nav">
    <ul class="left">
      <li class="dropdown"><a href="#">Home</a>
        <div class="dropdown-content">
          <a href="#">Third</a>
          <a href="#">Third Link</a>
          <a href="#">Third Link 3</a>
        </div>
      </li>
      <li><a href="#">Gods</a></li>
      <li><a href="#">Goddesses</a></li>
    </ul>
    <div class="play-now"></div>
    <ul class="right">
      <li><a href="#">Heroes</a></li>
      <li><a href="#">Myths</a></li>
      <li><a href="#">Beasts</a></li>
    </ul>
  </div>
</nav>

Answer 1

$(document).ready(function(){
  $('.dropdown-submenu a.test').on("click", function(e){
    $(this).next('ul').toggle();
    e.stopPropagation();
    e.preventDefault();
  });
});

<style>
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -1px;
}
</style>

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
   
<div class="container">
  <div class="dropdown">
    <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Dropdown
    <span class="caret"></span></button>
    <ul class="dropdown-menu">
      <li><a tabindex="-1" href="#">HTML</a></li>
      <li><a tabindex="-1" href="#">CSS</a></li>
      <li class="dropdown-submenu">
        <a class="test" tabindex="-1" href="#">New dropdown <span class="caret"></span></a>
        <ul class="dropdown-menu">
          <li><a tabindex="-1" href="#">2nd level dropdown</a></li>
          <li><a tabindex="-1" href="#">2nd level dropdown</a></li>
          <li class="dropdown-submenu">
            <a class="test" href="#">Another dropdown <span class="caret"></span></a>
            <ul class="dropdown-menu">
              <li><a href="#">3rd level dropdown</a></li>
              <li><a href="#">3rd level dropdown</a></li>
            </ul>
          </li>
        </ul>
      </li>
    </ul>
  </div>
</div>
</body>
</html>