如何在下拉菜单中创建子菜单 (HTML/CSS)

How To Create SubMenu in Drop Down (HTML/CSS)

提问by aziu

I just want create submenu in my drop down ... but I cant find code to fix this.

我只想在我的下拉菜单中创建子菜单......但我找不到解决这个问题的代码。

HTML CODE :

HTML代码：

<nav id='menu'>
  <ul>
    <li><a class='home' href='/'>Home</a></li>
    <li><a class='prett' href='#' title='Menu'>Menu</a>
      <ul class='menus'>
        <li><a class='prett' href='Dropdown 1' title='Dropdown 1'>Dropdown 1 + Sub Menu</a>
          <ul class='submenu'>
            <li><a href="#" title="Sub Menu">Sub Menu</a></li>
          </ul>
        </li>
        <li><a href='#' title='Dropdown 2'>Dropdown 2</a></li>
        <li><a href='#' title='Dropdown 3'>Dropdown 3</a></li>
      </ul>
    </li>
  </ul>
</nav>

CSS CODE :

代码：

#menu{background:#343434;color:#eee;height:35px;border-bottom:4px solid #eeeded}
#menu ul,#menu li{margin:0 0;padding:0 0;list-style:none}
#menu ul{height:35px}
#menu li{float:left;display:inline;position:relative;font:bold 12px Arial;text-shadow: 0 -1px 0 #000;border-right: 1px solid #444;border-left: 1px solid #111;text-transform:uppercase}
#menu li:first-child{border-left: none}
#menu a{display:block;line-height:35px;padding:0 14px;text-decoration:none;color:#eee;}
#menu li:hover > a,#menu li a:hover{background:#111}
#menu input{display:none;margin:0 0;padding:0 0;width:80px;height:35px;opacity:0;cursor:pointer}
#menu label{font:bold 30px Arial;display:none;width:35px;height:36px;line-height:36px;text-align:center}
#menu label span{font-size:12px;position:absolute;left:35px}
#menu ul.menus{height:auto;overflow:hidden;width:180px;background:#111;position:absolute;z-index:99;display:none;border:0;}
#menu ul.menus li{display:block;width:100%;font:12px Arial;text-transform:none;}
#menu li:hover ul.menus{display:block}
#menu a.home {background: #c00;}
#menu a.prett{padding:0 27px 0 14px}
#menu a.prett::after{content:"";width:0;height:0;border-width:6px 5px;border-style:solid;border-color:#eee transparent transparent transparent;position:absolute;top:15px;right:9px}
#menu ul.menus a:hover{background:#333;}

Thanks , this site will really help me so much

谢谢，这个网站真的对我有很大帮助

回答by thepio

I'm not quite sure what kind of result are you expecting but one way to do this is to add a class to the submenu li and watch when it's hovered, after which you show the submenu. Like this:

我不太确定您期望什么样的结果，但一种方法是将一个类添加到子菜单 li 并观察它何时悬停，然后显示子菜单。像这样：

#menu {
  background: #343434;
  color: #eee;
  height: 35px;
  border-bottom: 4px solid #eeeded
}

#menu ul,
#menu li {
  margin: 0 0;
  padding: 0 0;
  list-style: none
}

#menu ul {
  height: 35px
}

#menu li {
  float: left;
  display: inline;
  position: relative;
  font: bold 12px Arial;
  text-shadow: 0 -1px 0 #000;
  border-right: 1px solid #444;
  border-left: 1px solid #111;
  text-transform: uppercase
}

#menu li:first-child {
  border-left: none
}

#menu a {
  display: block;
  line-height: 35px;
  padding: 0 14px;
  text-decoration: none;
  color: #eee;
}

#menu li:hover > a,
#menu li a:hover {
  background: #111
}

#menu input {
  display: none;
  margin: 0 0;
  padding: 0 0;
  width: 80px;
  height: 35px;
  opacity: 0;
  cursor: pointer
}

#menu label {
  font: bold 30px Arial;
  display: none;
  width: 35px;
  height: 36px;
  line-height: 36px;
  text-align: center
}

#menu label span {
  font-size: 12px;
  position: absolute;
  left: 35px
}

#menu ul.menus {
  height: auto;
  width: 180px;
  background: #111;
  position: absolute;
  z-index: 99;
  display: none;
  border: 0;
}

#menu ul.menus li {
  display: block;
  width: 100%;
  font: 12px Arial;
  text-transform: none;
}

#menu li:hover ul.menus {
  display: block
}

#menu a.home {
  background: #c00;
}

#menu a.prett {
  padding: 0 27px 0 14px
}

#menu a.prett::after {
  content: "";
  width: 0;
  height: 0;
  border-width: 6px 5px;
  border-style: solid;
  border-color: #eee transparent transparent transparent;
  position: absolute;
  top: 15px;
  right: 9px
}

#menu ul.menus a:hover {
  background: #333;
}

#menu ul.menus .submenu {
  display: none;
  position: absolute;
  left: 180px;
  background: #111;
  top: 0;
  width: 180px;
}

#menu ul.menus .submenu li {
  background: #111;
}

#menu ul.menus .has-submenu:hover .submenu {
  display: block;
}

<nav>
  <ul id='menu'>
    <li><a class='home' href='/'>Home</a></li>
    <li><a class='prett' href='#' title='Menu'>Menu</a>
      <ul class='menus'>
        <li class='has-submenu'><a class='prett' href='Dropdown 1' title='Dropdown 1'>Dropdown 1 + Sub Menu</a>
          <ul class='submenu'>
            <li><a href="#" title="Sub Menu">Sub Menu</a></li>
            <li><a href="#" title="Sub Menu">Sub Menu 2</a></li>
            <li><a href="#" title="Sub Menu">Sub Menu 3</a></li>
          </ul>
        </li>
        <li><a href='#' title='Dropdown 2'>Dropdown 2</a></li>
        <li><a href='#' title='Dropdown 3'>Dropdown 3</a></li>
      </ul>
    </li>
  </ul>
</nav>

EDIT:

编辑：

With Javascript and click to open: https://jsfiddle.net/thepio/pn0ym10e/2/

使用Javascript并点击打开：https: //jsfiddle.net/thepio/pn0ym10e/2/