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.
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This property has no effect on non-replaced inline elements, such as <span>
or <code>
.
Syntax
/* <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: 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 width 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 and ::first-line . |
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
<length> | <percentage> | auto
Examples
Setting positive and negative bottom margins
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
.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
.container { background-color:orange; width:320px; border:1px solid black; } div { width:320px; background-color:gold; }
Result
Specifications
Specification | Status | Comment |
---|---|---|
CSS Basic Box Model The definition of 'margin-bottom' in that specification. |
Working Draft | No significant change |
CSS Level 2 (Revision 1) The definition of 'margin-bottom' in that specification. |
Recommendation | Removes its effect on inline elements. |
CSS Level 1 The definition of 'margin-bottom' in that specification. |
Recommendation | Initial definition |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
margin-bottom | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support 3.5 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 |
auto | Chrome Full support 1 | Edge
Full support
12
| Firefox Full support 1 | IE
Full support
6
| Opera Full support 3.5 | Safari Full support 1 | WebView Android Full support 37 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 14 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support
- See implementation notes.
- See implementation notes.
See also
margin-top
,margin-right
, andmargin-left
and themargin
shorthand- The mapped logical properties:
margin-block-start
,margin-block-end
,margin-inline-start
, andmargin-inline-end
and the shorthandsmargin-block
andmargin-inline