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The background-position-y CSS property sets the initial vertical position, relative to the background position layer defined by background-origin, for each defined background image.

The value of this property is overridden by any declaration of the background or background-position shorthand properties applied to the element after it.

Syntax

/* Keyword values */
background-position-y: top;
background-position-y: center;
background-position-y: bottom;

/* <percentage> values */
background-position-y: 25%;

/* <length> values */
background-position-y: 0px;
background-position-y: 1cm;
background-position-y: 8em;

/* Side-relative values */
background-position-y: bottom 3px;
background-position-y: bottom 10%;

/* Multiple values */
background-position-y: 0px, center;

/* Global values */
background-position-y: inherit;
background-position-y: initial;
background-position-y: unset;

The background-position-y property is specified as one or more values, separated by commas.

Values

top
Aligns the top edge of the background image with the top edge of the background position layer.
center
Aligns the vertical center of the background image with the vertical center of the background position layer.
bottom
Aligns the bottom edge of the background image with the bottom edge of the background position layer.
<length>
The offset of the given background image's vertical edge from the corresponding background position layer's vertical edge. If no edge is given, it refers to the top edge.
<percentage>
The offset of the given background image's vertical edge from the corresponding background position layer's vertical edge relative to its height. If no edge is given, it refers to the top edge.

Formal syntax

[ center | [ top | bottom | y-start | y-end ]? <length-percentage>? ]#

where
<length-percentage> = <length> | <percentage>

Specifications

Specification Status Comment
CSS Backgrounds and Borders Module Level 4
The definition of 'background-position-y' in that specification.
Editor's Draft Initial specification of longhand sub-properties of background-position to match longstanding implementations.

Initial valuetop
Applies toall elements
Inheritedno
Percentagesrefer to height of background positioning area minus height of background image
Mediavisual
Computed valueA list, each item consisting of: an offset given as a combination of an absolute length and a percentage, plus an origin keyword
Animation typediscrete
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 AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support YesEdge Full support 12Firefox Full support 49IE Full support 6Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 49Opera Android ? Safari iOS ? Samsung Internet Android Full support Yes
Two-value syntax (support for offsets from any edge)Chrome No support NoEdge Full support 12Firefox Full support 49IE Full support 9Opera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoEdge Mobile Full support YesFirefox Android Full support 49Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also

Etiquetas do documento e contribuidores

Contribuidores para esta página: wbamberg, mfluehr, fscholz, captainbarbosa, teoli, erikadoyle, Sebastianz, DBaron
Última atualização por: wbamberg,