---
title: Dropdowns
---
## Dropdowns
Dropdowns are used in CSS to hide a predefined list within a button.
Examples:
```html
```
Then you should customise the classes in css
```css
.dropdown {
position: relative;
display: inline-block;
}
.dropbtn {
background-color: red;
padding: 10px;
}
.dropdown-content {
display: none;
position: absolute;
}
.dropdown:hover .dropdown-content {
display:block;
}
```
You need the separate div classes to create the button, and another div to separate the list of what the button contains.
#### An Example
```html
```
```css
#myNav1 {
height: 0;
width: 50%;
position: fixed;
z-index: 6;
top: 0;
left: 0;
background-color: #ffff;
overflow: hidden;
transition: 0.3s;
opacity: 0.85;
}
#myNav2 {
height: 0;
width: 50%;
position: fixed;
z-index: 6;
bottom: 0;
right: 0;
background-color: #ffff;
overflow: hidden;
transition: 0.3s;
opacity: 0.85;
}
.overlay-content {
position: relative;
width: 100%;
text-align: center;
margin-top: 30px;
}
#myNav1-content{
top: 12%;
left: 5%;
display: none;
}
#myNav2-content{
top: 12%;
right: 10%;
display: none;
}
```
#### More Information:
* W3 School Dropdown Hover Button: Link to W3 School
* W3 School Dropdowns: Link to W3 School