如何在下拉菜单中使下拉菜单包含另一个下拉菜单的宽度为100％？

Question

需要这种类型的下拉列表，并且在同一下拉列表中有另一个下拉列表，我在引导程序中使用navbar尝试了正常的下拉列表方法，但我无法实现。

我的代码是：

<div class="dropdown">
  <button class="dropbtn">Dropdown</button>
  <div class="dropdown-content">
  <a href="#">Link 1</a>
  <a href="#">Link 2</a>
  <a href="#">Link 3</a>
  </div>
</div>

我的风格是：

.dropbtn {
  background-color: #4CAF50;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

/* The container <div> - needed to position the dropdown content */
.dropdown {
  position: relative;
  display: inline-block;
}

/* Dropdown Content (Hidden by Default) */
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

/* Links inside the dropdown */
.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

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

Answer 1

这是支持嵌套下拉列表的代码的修改版本。根据您提供的屏幕截图，您希望它可以单击而不是悬停，为此，您只需替换css :hover并使用React钩子来触发打开和关闭，欢呼。

.dropbtn {
  background-color: #4CAF50;
	width: 100%;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

/* The container <div> - needed to position the dropdown content */
.dropdown {
  position: relative;
	width: 100%;
  display: inline-block;
}

/* Dropdown Content (Hidden by Default) */
.dropdown-content {
  display: none;
	width: 100%;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

/* Links inside the dropdown */
.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropbtn_inside {
	color: black;
	cursor: pointer;
	background-color: #ffa;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown-content-inside {
	display: none;
}

.dropbtn_inside:hover > .dropdown-content-inside  {
	display: block;
}

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

<div class="dropdown">
  <button class="dropbtn">Dropdown</button>
  <div class="dropdown-content">
		<a href="#">Link 1</a>
		<a href="#">Link 2</a>
		<div class="dropbtn_inside">
			Link 3
			<div class="dropdown-content-inside">
				<a href="#">Link 4</a>
				<a href="#">Link 5</a>
			</div>
		</div>
  </div>
</div>