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.
This property has no effect on non-replaced inline elements, such as <span>
or <code>
.
/* <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.
<length>
<percentage>
auto
margin
.<length> | <percentage> | auto
<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 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; }
Specification | Status | Comment |
---|---|---|
CSS Basic Box Model The definition of 'margin-bottom' in that specification. | Working Draft | No significant change |
CSS Transitions The definition of 'margin-bottom' in that specification. | Working Draft | Defines margin-bottom as animatable. |
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 |
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 |
Media | visual |
Computed value | the percentage as specified or the absolute length |
Animation type | a length |
Canonical order | the unique non-ambiguous order defined by the formal grammar |
Desktop | ||||||
---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
Basic support | 1 | 12 | 1 | 3 | 3.5 | 1 |
auto |
1 | ? | 1 | 6
|
3.5 | 1 |
Mobile | |||||||
---|---|---|---|---|---|---|---|
Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
Basic support | 1 | ? | Yes | 4 | 6 | 1 | ? |
auto |
? | ? | ? | 4 | ? | ? | ? |
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https://developer.mozilla.org/en-US/docs/Web/CSS/margin-bottom