CSS Dropdowns

Create a hoverable dropdown with CSS.

Basic Dropdown

Create a dropdown box that appears when the user moves the mouse over an element.

<style>  
	.dropdown  {  
		position:  relative;  
		display:  inline-block;  
	}  
  
	.dropdown-content  {  
		display:  none;  
		position:  absolute;  
		background-color:  #f9f9f9;  
		min-width:  160px;  
		box-shadow:  0px 8px 16px 0px rgba(0,0,0,0.2);  
		padding:  12px 16px;  
		z-index:  1;  
	}  
	  
	.dropdown:hover .dropdown-content  {  
		display:  block;  
	}  
</style>  
  
<div class="dropdown">  
	<span>Mouse over me</span>  
	<div class="dropdown-content">  
		<p>Hello World!</p>  
	</div>  
</div>

Explanation:

• HTML: Use any element to open the dropdown content, e.g. a <span>, or a <button> element. Use a container element (like <div>) to create the dropdown content and add whatever you want inside of it. Wrap a <div> element around the elements to position the dropdown content correctly with CSS.

• CSS: The .dropdown class uses position:relative, which is needed when we want the dropdown content to be placed right below the dropdown button (using position:absolute). The .dropdown-content class holds the actual dropdown content. It is hidden by default, and will be displayed on hover (see below). Note the min-width is set to 160px. Feel free to change this.
  Instead of using a border, we have used the CSS box-shadow property to make the dropdown menu look like a "card". The :hover selector is used to show the dropdown menu when the user moves the mouse over the dropdown button.

note

If you want the width of the dropdown content to be as wide as the dropdown button, set the width to 100% (and overflow:auto to enable scroll on small screens).

Dropdown Menu

Create a dropdown menu that allows the user to choose an option from a list.

This example is similar to the previous one, except that we add links inside the dropdown box and style them to fit a styled dropdown button.

<style>  
	/* Style The Dropdown Button */  
	.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;  
	}  
	  
	/* Change color of dropdown links on hover */  
	.dropdown-content a:hover  {background-color:  #f1f1f1}  
	  
	/* Show the dropdown menu on hover */  
	.dropdown:hover .dropdown-content  {  
		display:  block;  
	}  
	  
	/* Change the background color of the dropdown button when the dropdown content is shown */  
	.dropdown:hover .dropbtn  {  
		background-color:  #3e8e41;  
	}  
</style>  
  
<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>

Right-aligned Dropdown Content

If you want the dropdown menu to go from right to left, instead of left to right, add right: 0;

.dropdown-content {  
	right:  0;  
}