css - 如何在div中创建下拉菜单？

Question

如何在将指针移到文本 1x 的 div 上时显示可滚动菜单显示可滚动菜单。

我想做的是类似于下图的事情:

我的代码结构:

.spdText {
    width: 3em;
    height: 1.8em;
    line-height: 1.8em;
    position: relative;
    font-size: 1em;
    font-weight: 900;
    text-shadow: none;
    border-radius: 10%;
    color: #29303b;
    background-color: hsla(0,0%,100%,.9);
}


.speed {
  display: none;
  position: absolute;
  max-height: 0;
  transition: max-height 1s;
}

.speed:hover,
.btnSpd:hover .speed {
  display: inline-table;
  list-style: none;
  max-height: 300px;
  transition: max-height 1s;
  top: -170px;
}

<div class="spdText">1x
  <ul class="speed">
    <li>x3</li>
    <li>x1</li>
  </ul>
</div>

Answer 1

是这样的吗？

编辑:首先，在“spdText”上方留一个空格。您将 'speed' 置于 'spdText' 之上，给它一个负的最高值。

.spdText {
    width: 3em;
    height: 1.8em;
    line-height: 1.8em;
    position: relative;
    font-size: 1em;
    font-weight: 900;
    text-shadow: none;
    border-radius: 10%;
    color: #29303b;
    background-color: hsla(0,0%,100%,.9);
    margin-top:5rem; /*  You leave a space above  */
}


.speed {
  display: none;
  position: absolute;
  max-height: 0;
  transition: max-height 1s;
}

.spdText:hover .speed {
  display: block;
  list-style: none;
  max-height: 300px;
  transition: max-height 1s;
  left:-25px;
  background-color: black;
  opacity: 0.5;
  color: white;
  top: -4.4rem;
}

<div class="spdText">1x
  <ul class="speed">
    <li>x3</li>
    <li>x1</li>
  </ul>
</div>