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How TO – Dropup
Dropup
A dropup menu is a toggleable menu that allows the user to choose one value from a predefined list:
Example
<!DOCTYPE html>
<html>
<head>
<meta name=”viewport” content=”width=device-width, initial-scale=1″>
<style>
.dropbtn {
background-color: #3498DB;
color: white;
padding: 16px;
font-size: 16px;
border: none;
}
.dropup {
position: relative;
display: inline-block;
}
.dropup-content {
display: none;
position: absolute;
background-color: #f1f1f1;
min-width: 160px;
bottom: 50px;
z-index: 1;
}
.dropup-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
.dropup-content a:hover {background-color: #ccc}
.dropup:hover .dropup-content {
display: block;
}
.dropup:hover .dropbtn {
background-color: #2980B9;
}
</style>
</head>
<body style=”background-color:white;”>
<h2>Hoverable Dropup</h2>
<p>Example text…</p>
<p>Example text…</p>
<p>Move the mouse over the button to open the dropup menu.</p>
<div>
<button>Dropup</button>
<div>
<a href=”#”>Link 1</a>
<a href=”#”>Link 2</a>
<a href=”#”>Link 3</a>
</div>
</div>
</body>
</html>
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
<!DOCTYPE html>
<html>
<head>
<meta name=”viewport” content=”width=device-width, initial-scale=1″>
<style>
.dropbtn {
background-color: #3498DB;
color: white;
padding: 16px;
font-size: 16px;
border: none;
}
.dropup {
position: relative;
display: inline-block;
}
.dropup-content {
display: none;
position: absolute;
background-color: #f1f1f1;
min-width: 160px;
bottom: 50px;
z-index: 1;
}
.dropup-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
.dropup-content a:hover {background-color: #ccc}
.dropup:hover .dropup-content {
display: block;
}
.dropup:hover .dropbtn {
background-color: #2980B9;
}
</style>
</head>
<body style=”background-color:white;”>
<h2>Hoverable Dropup</h2>
<p>Example text…</p>
<p>Example text…</p>
<p>Move the mouse over the button to open the dropup menu.</p>
<div>
<button>Dropup</button>
<div>
<a href=”#”>Link 1</a>
<a href=”#”>Link 2</a>
<a href=”#”>Link 3</a>
</div>
</div>
</body>
</html>
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.