仅使用CSS实现简单的下拉菜单

时间:2018-03-26 17:22:59

标签: html css

我前一段时间一直在练习CSS,并试图在不使用bootstrap或jQuery的情况下实现一个简单的下拉菜单。

问题是,我无法完全模仿下拉菜单,如下图所示。

期待结果

enter image description here

当前结果

enter image description here

<div id="menu">
  <a href="#" class="menu-toggle">
    <span></span>
    <span></span>
    <span></span>
  </a>
  <ul id="dropdown-menu">
    <li class="dropdown-item">
      <a href="#about">About</a>
    </li>
    <li class="dropdown-item">
      <a href="#travel">Travel</a>
    </li>
    <li class="dropdown-item">
      <a href="#food">Food</a>
    </li>
  </ul>
</div>

Please check out the fiddle to see styling

2 个答案:

答案 0 :(得分:1)

所以你的小提琴演示中有很多不准确之处,所以我想我会把它改写成你想要的结果,然后你可以从那里开始。 css下拉菜单背后的理论是包含元素将具有某个位置(在这种情况下,我将其定位为相对位置),下拉菜单将在包含元素内部具有绝对位置,并且显示为none。然后,当您将鼠标悬停在包含元素上时,下拉列表将显示一个块,因此这里是您尝试实现的实例。

#menu{
  position:relative;
  display:inline-block;
  /*font size 0 removes white space from inline block elements add font size to  the dropdown menu*/
  font-size:0;
}
#menu .menu-toggle {
  padding: 10px;
  background: rgba(255,255,255,0.9);
  border:1px solid rgb(220,220,220);
  display:inline-block;
}
#menu .menu-toggle span{
  display:block;
  margin: 3px 0px;
  width: 18px;
  height: 3px;
  background: #33333D;
}

#dropdown-menu{
  display:none;
  list-style-type:none;
  margin:0;
  padding:0;
  position:absolute;
  top:100%;
  left:0;
  border:1px solid rgb(220,220,220);
  font-size:16px;
}
#menu:hover #dropdown-menu{
  display:block;
}
#dropdown-menu li a{
  display:block;
  padding:5px 15px;
  color:inherit;
  text-decoration:none;
}
<div id="menu">
    <a class="menu-toggle">
      <span></span>
      <span></span>
      <span></span>
    </a>
    <ul id="dropdown-menu">
      <li class="dropdown-item">
        <a href="#about">About</a>
      </li>
      <li class="dropdown-item">
        <a href="#travel">Travel</a>
      </li>
      <li class="dropdown-item">
        <a href="#food">Food</a>
      </li>
    </ul>
  </div>

答案 1 :(得分:1)

<div class="menu-area">
  <div id="menu">
  <a href="#" class="menu-toggle">
    <span></span>
    <span></span>
    <span></span>
  </a>
  <ul id="dropdown-menu">
    <li class="dropdown-item">
     <a href="#about">About</a>
    </li>
    <li class="dropdown-item">
      <a href="#travel">Travel</a>
    </li>
    <li class="dropdown-item">
      <a href="#food">Food</a>
    </li>
  </ul>
  </div>
</div>



.menu-area {
   width: 220px;
   position: relative;
   text-align: right;
}
#menu {
    display: inline-block;
}
a.menu-toggle {
    width: 30px;
    height: 30px;
    padding: 5px 10px;
    display: inline-block;
    border: 1px solid #ddd;
    z-index: 9;
    background: #fff;
    position: relative;
    transition: .3s;
}
#menu:hover a.menu-toggle {
    border-bottom: 0;
}
a.menu-toggle span {
    height: 3px;
    display: block;
    margin-top: 5px;
    background: #555;
}
ul#dropdown-menu {
    position: absolute;
    top: 50px;
    width: 218px;
    transition: .3s;
    opacity: 0;
    visibility: hidden;
    padding: 20px 0px;
    border: 1px solid #ddd;
    margin: 0;
    text-align: left;
    left: 0;
}
#menu:hover ul#dropdown-menu {
    top: 40px;
    opacity: 1;
    visibility: visible;
}

ul#dropdown-menu li {
    margin: 0;
    padding: 5px 30px;
    display: block;
}
ul#dropdown-menu li a {
    display: inline-block;
    transition: .3s;
    color: #333;
    text-decoration: none;
    font-size: 18px;
}
ul#dropdown-menu li a:hover {
    color: #666;
}