How to Create: Collapsible Sidebar

Create a collapsible sidebar

Step 1 - Add HTML:

<div id="mySidebar" class="sidebar">
  <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>
<div id="main">
  <button class="openbtn" onclick="openNav()">☰ Open Sidebar</button>
  <h2>Collapsed Sidebar</h2>
  <p>Content...</p>
</div>

Step 2 - Add CSS:

/* Sidebar menu */
.sidebar {
  height: 100%; /* 100% Full-height */
  width: 0; /* 0 width - Use JavaScript to change this setting */
  position: fixed; /* Stay in the original position */
  z-index: 1; /* Stay on top */
  top: 0;
  left: 0;
  background-color: #111; /* Black */
  overflow-x: hidden; /* Disable horizontal scrolling */
  padding-top: 60px; /* Place the content 60px from the top */
  transition: 0.5s; /* A sliding sidebar effect with a duration of 0.5 seconds */
}
/* The sidebar links */
.sidebar a {
  padding: 8px 8px 8px 32px;
  text-decoration: none;
  font-size: 25px;
  color: #818181;
  display: block;
  transition: 0.3s;
}
/* When the mouse is hovered over the navigation link, change its color */
.sidebar a:hover {
  color: #f1f1f1;
}
/* Position and style of the close button (upper right corner) */
.sidebar .closebtn {
  position: absolute;
  top: 0;
  right: 25px;
  font-size: 36px;
  margin-left: 50px;
}
/* Button used to open the sidebar */
.openbtn {
  font-size: 20px;
  cursor: pointer;
  background-color: #111;
  color: white;
  padding: 10px 15px;
  border: none;
}
.openbtn:hover {
  background-color: #444;
}
/* Set the style of the page content - Use this style if you want to push the page content to the right when opening the side navigation */
#main {
  transition: margin-left .5s; /* If you want a transition effect */
  padding: 20px;
}
/* Change the style of the sidebar on small screens with a height less than 450 pixels (reduce padding and font size) */
@media screen and (max-height: 450px) {
  .sidebar {padding-top: 15px;}
  .sidebar a {font-size: 18px;}
}

Step 3 - Add JavaScript:

/* Set the width of the sidebar to 250px and set the left outer margin of the page content to 250px */
function openNav() {
  document.getElementById("mySidebar").style.width = "250px";
  document.getElementById("main").style.marginLeft = "250px";
}
/* Set the width of the sidebar to 0 and set the left outer margin of the page content to 0 */
function closeNav() {
  document.getElementById("mySidebar").style.width = "0";
  document.getElementById("main").style.marginLeft = "0";
}

Try It Yourself

Related Pages

Tutorial:CSS Navigation Bar