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The margin-top CSS property sets the margin area on the top 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>.

Syntax

/* <length> values */
margin-top: 10px;  /* An absolute length */
margin-top: 1em;   /* relative to the text size */
margin-top: 5%;    /* relative to the nearest block container's width */

/* Keyword values */
margin-top: auto;

/* Global values */
margin-top: inherit;
margin-top: initial;
margin-top: unset;

The margin-top 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 syntax

<length> | <percentage> | auto

Examples

.content { margin-top:   5%; }
.sidebox { margin-top: 10px; }
.logo    { margin-top: -5px; }
#footer  { margin-top:  1em; } 

Specifications

Specification Status Comment
CSS Basic Box Model
The definition of 'margin-top' in that specification.
Working Draft No significant change
CSS Transitions
The definition of 'margin-top' in that specification.
Working Draft Defines margin-top as animatable.
CSS Level 2 (Revision 1)
The definition of 'margin-top' in that specification.
Recommendation Removes its effect on inline elements.
CSS Level 1
The definition of 'margin-top' in that specification.
Recommendation Initial definition

Initial value0
Applies toall elements, except elements with table display types other than table-caption, table and inline-table. It also applies to ::first-letter.
Inheritedno
Percentagesrefer to the width of the containing block
Mediavisual
Computed valuethe percentage as specified or the absolute length
Animation typea length
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3.5Safari Full support 1WebView Android Full support 1Chrome Android ? Edge Mobile Full support YesFirefox Android Full support 4Opera Android Full support 6Safari iOS Full support 1Samsung Internet Android ?
autoChrome Full support 1Edge ? Firefox Full support 1IE Full support 6
Notes
Full support 6
Notes
Notes The auto value is not supported in quirks mode.
Opera Full support 3.5Safari Full support 1WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support 4Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.

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最近更新: ddbeck,