How TO - Dropup
Learn how to create a dropup menu with CSS.
Dropup
A dropup menu is a toggleable menu that allows the user to choose one value from a predefined list:
Try it Yourself »Create A Hoverable Dropup
Create a dropup menu that appears when the user moves the mouse over an element.
Step 1) Add HTML:
Example
<div class="dropup">
<button class="dropbtn">Dropup</button>
<div class="dropup-content">
<a href="#">Link
1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
Example Explained
Use any element to open the dropup menu, e.g. a <button>, <a> or <p> element.
Use a container element (like <div>) to create the dropup menu and add the dropup links inside it.
Wrap a <div> element around the button and the <div> to position the dropup menu correctly with CSS.
Step 2) Add CSS:
Example
/* Dropup Button */
.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
}
/* The
container <div> - needed to position the dropup content */
.dropup {
position: relative;
display:
inline-block;
}
/* Dropup content (Hidden by Default) */
.dropup-content {
display: none;
position:
absolute;
bottom: 50px;
background-color: #f1f1f1;
min-width: 160px;
box-shadow:
0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}
/* Links inside the
dropup */
.dropup-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
/* Change color of dropup links on hover */
.dropup-content a:hover {background-color: #ddd}
/* Show the
dropup menu on hover */
.dropup:hover .dropup-content {
display: block;
}
/* Change the background color of the dropup button when the
dropup content is shown */
.dropup:hover .dropbtn {
background-color: #3e8e41;
}
Try it Yourself »
Example Explained
We have styled the dropup button with a background-color, padding, etc.
The .dropup class uses position:relative, which is needed when we want the
dropup content to be placed on top of the dropup button (using position:absolute).
The .dropup-content class holds the actual
dropup menu. 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. Tip: If you want the width of the dropup content to be
as wide as the dropup button, set the width to 100% (and overflow:auto to
enable scroll on small screens).
Instead of using a border, we have used the box-shadow property to make the
dropup menu look like a "card". We also use z-index to place the dropup in
front of other elements.
The :hover selector is used to show the
dropup menu when the user moves the
mouse over the dropup button.
