如何在一个地方粘贴下拉箭头

Question

我正在尝试将箭头固定在一个固定位置。目前，如果下拉选项增加，则箭头会移位，如您在 codesandbox 和下面的示例中所见。要重新生成，请在服务下拉列表中添加选项以查看 arrow/beak 被替换。

.list {
  display: flex;
  flex-direction: column;
  width: 100px;
}

.list .item {
  padding: 10px;
  font-size: 24px;
  font-weight: normal;
  background-color: #ccc;
  cursor: pointer;
}

.list .item:hover {
  text-decoration: underline;
}

.list .item.item-dropdown {
  position: relative;
}

.list .item.item-dropdown:hover .dropdown-content {
  display: block;
}

.list .dropdown-content {
  display: none;
  position: absolute;
  left: 100px;
  bottom: -20px;
}

.list .dd-menu {
  position: relative;
  margin-left: 20px;
  background-color: #ccc;
  padding: 5px 20px;
}

.list .dd-menu:before {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  border-top: 17px solid transparent;
  border-right: 14px solid #ccc;
  border-bottom: 17px solid transparent;
  margin-left: -8px;
  top: 45%;
  left: -4%;
}

<div class="list">
  <div class="item">Home</div>
  <div class="item">About</div>
  <div class="item item-dropdown">Services
    <div class="dropdown-content">
      <div class="dd-menu">
        <div class="item">Cleaning</div>
        <div class="item">Dry</div>
      </div>
    </div>
  </div>
</div>

Answer 1

就像您使用 bottom 属性对齐 .dropdown-content 一样，在 .dd-menu:before 上使用 bottom 属性将其对齐到位即与 'Services'.

相邻

.list {
  display: flex;
  flex-direction: column;
  width: 100px;
}

.list .item {
  padding: 10px;
  font-size: 24px;
  font-weight: normal;
  background-color: #ccc;
  cursor: pointer;
}

.list .item:hover {
  text-decoration: underline;
}

.list .item.item-dropdown {
  position: relative;
}

.list .item.item-dropdown:hover .dropdown-content {
  display: block;
}

.list .dropdown-content {
  display: none;
  position: absolute;
  left: 100px;
  bottom: -20px;
}

.list .dd-menu {
  position: relative;
  margin-left: 20px;
  background-color: #ccc;
  padding: 5px 20px;
}

.list .dd-menu:before {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  border-top: 17px solid transparent;
  border-right: 14px solid #ccc;
  border-bottom: 17px solid transparent;
  margin-left: -8px;
  bottom: 24px;
  left: -4%;
}

<div class="list">
  <div class="item">Home</div>
  <div class="item">About</div>
  <div class="item item-dropdown">Services
    <div class="dropdown-content">
      <div class="dd-menu">
        <div class="item">Cleaning</div>
        <div class="item">Dry</div>
        <div class="item">Ironing</div>
      </div>
    </div>
  </div>
</div>

如何在一个地方粘贴下拉箭头

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