margin-bottom
The margin-bottom
CSS property sets the margin area on the bottom of an element. A positive value places it farther from its neighbors, while a negative value places it closer.
Try it
Syntax
css
/* <length> values */
margin-bottom: 10px; /* An absolute length */
margin-bottom: 1em; /* relative to the text size */
margin-bottom: 5%; /* relative to the nearest block container's width */
/* Keyword values */
margin-bottom: auto;
/* Global values */
margin-bottom: inherit;
margin-bottom: initial;
margin-bottom: revert;
margin-bottom: revert-layer;
margin-bottom: unset;
The margin-bottom
property is specified as the keyword auto
, or a <length>
, or a <percentage>
. Its value can be positive, zero, or negative.
Values
<length>
-
The size of the margin as a fixed value.
<percentage>
-
The size of the margin as a percentage, relative to the inline size (width in a horizontal language, defined by
writing-mode
) of the containing block. auto
-
The browser selects a suitable value to use. See
margin
.
Formal definition
Initial value | 0 |
---|---|
Applies to | all elements, except elements with table display types other than table-caption , table and inline-table . It also applies to ::first-letter . |
Inherited | no |
Percentages | refer to the width of the containing block |
Computed value | the percentage as specified or the absolute length |
Animation type | a length |
Formal syntax
margin-bottom =
<length-percentage> |
auto |
<anchor-size()>
<length-percentage> =
<length> |
<percentage>
<anchor-size()> =
anchor-size( [ <anchor-element> || <anchor-size> ]? , <length-percentage>? )
<anchor-element> =
<dashed-ident>
<anchor-size> =
width |
height |
block |
inline |
self-block |
self-inline
Examples
Setting positive and negative bottom margins
HTML
html
<div class="container">
<div class="box0">Box 0</div>
<div class="box1">Box 1</div>
<div class="box2">Box one's negative margin pulls me up</div>
</div>
CSS
CSS for divs to set margin-bottom and height
css
.box0 {
margin-bottom: 1em;
height: 3em;
}
.box1 {
margin-bottom: -1.5em;
height: 4em;
}
.box2 {
border: 1px dashed black;
border-width: 1px 0;
margin-bottom: 2em;
}
Some definitions for container and divs so margins' effects can be seen more clearly
css
.container {
background-color: orange;
width: 320px;
border: 1px solid black;
}
div {
width: 320px;
background-color: gold;
}
Result
Specifications
Specification |
---|
CSS Box Model Module Level 3 # margin-physical |
Browser compatibility
BCD tables only load in the browser
See also
margin-top
,margin-right
, andmargin-left
margin
shorthandmargin-block-start
,margin-block-end
,margin-inline-start
, andmargin-inline-end
margin-block
andmargin-inline
shorthands- CSS box model module