如何操作 - 折叠侧面板

了解如何创建可折叠的侧面板菜单。

创建折叠的侧面板

步骤1）添加HTML：

示例

<div id="mySidepanel" class="sidepanel">
<a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a>
<a href="#">About</a>
<a href="#">Services</a>
<a href="#">Clients</a>
<a href="#">Contact</a>
</div>

<button class="openbtn" onclick="openNav()">☰ Toggle Sidepanel</button>
<h2>Collapsed Sidepanel</h2>
<p>Content...</p>

步骤2）添加CSS：

示例

/* The sidepanel menu */
.sidepanel {
  height: 250px; /* Specify a height */
  width: 0; /* 0 width - change this with JavaScript */
  position: fixed; /* Stay in place */
  z-index: 1; /* Stay on top */
  top: 0;
  left: 0;
  background-color: #111; /* Black*/
  overflow-x: hidden; /* Disable horizontal scroll */
  padding-top: 60px; /* Place content 60px from the top */
  transition: 0.5s; /* 0.5 second transition effect to slide in the sidepanel */
}

/* The sidepanel links */
.sidepanel a {
  padding: 8px 8px 8px 32px;
  text-decoration: none;
  font-size: 25px;
  color: #818181;
  display: block;
  transition: 0.3s;
}

/* When you mouse over the navigation links, change their color */
.sidepanel a:hover {
color: #f1f1f1;
}

/* Position and style the close button (top right corner) */
.sidepanel .closebtn {
position: absolute;
  top: 0;
right: 25px;
font-size: 36px;
margin-left: 50px;
}

/* Style the button that is used to open the sidepanel */
.openbtn {
font-size: 20px;
cursor: pointer;
background-color: #111;
color: white;
padding: 10px 15px;
border: none;
}

.openbtn:hover {
background-color: #444;
}

步骤 3) 添加 JavaScript：

示例

/* Set the width of the sidebar to 250px (show it) */
function openNav() {
document.getElementById("mySidepanel").style.width = "250px";
}

/* Set the width of the sidebar to 0 (hide it) */
function closeNav() {
document.getElementById("mySidepanel").style.width = "0";
}

亲自试一试 »

提示：去我们的CSS 导航栏教程了解有关导航栏的更多信息。