The bottom property specifies the vertical position of a positioned element.
Positioned elements are positioned as absolute, sticky, etc.
The effect of the bottom setting depends on the position value.
The inner element is positioned 40px from the bottom of the container.
<style>
.relative {
position: relative;
width: 400px;
height: 200px;
background-color: paleturquoise;
}
.absolute {
position: absolute;
left: 20px;
bottom: 40px;
width: 200px;
height: 90px;
background-color: teal;
}
</style>
<div class="relative">
<div class="absolute">
</div>
</div>
The effect of the bottom setting depends on the position value:
fixed or absolute - the bottom position is measured from its containing element.relative - the bottom is measured from its normal bottom position.sticky - the bottom specifies the sticky bottom position relative to the viewport.static - the bottom value has no effect.The bottom property has no effect on non-positioned elements.
bottom: auto | length | initial | inherit;
| Value | Description |
|---|---|
| auto | Default. The browser calculates the bottom position. |
| length | Sets the bottom position with any valid CSS length value. Negative values are allowed. |
| % | Sets the bottom position in % of the containing element. Negative values are allowed |
| initial | Sets the value to its default value. |
| inherit | Inherits the value from its parent. |
Click the buttons to see the different bottom values.
<style>
.bottom-relative {
position: relative;
width: 350px;
height: 200px;
background-color: firebrick;
}
.bottom-absolute {
position: absolute;
left: 15px;
bottom: -20px;
width: 250px;
height: 90px;
background-color: orangered;
transition: bottom 1s ease .2s;
}
</style>
<div class="bottom-relative">
<div class="bottom-absolute"></div>
</div>
This table shows when bottom support started for each browser.
 Chrome
|
1.0 | Dec 2008 |
 Firefox
|
1.0 | Nov 2004 |
 IE/Edge
|
5.5 | Jul 2000 |
 Opera
|
5.0 | Dec 2000 |
 Safari
|
1.0 | Jun 2003 |
