background-position-x

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El background-position-x propiedad de CSS  coloca la posicion horizontal inicial por cada imagen de fondo. La posicion es relativa a la posicion de la capa puesta por background-origin.

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-x: left;
background-position-x: center;
background-position-x: right;

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

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

/* Side-relative values */
background-position-x: right 3px;
background-position-x: left 25%;

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

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

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

Values

left
Aligns the left edge of the background image with the left edge of the background position layer.
center
Aligns the center of the background image with the center of the background position layer.
right
Aligns the right edge of the background image with the right edge of the background position layer.
<length>
The offset of the given background image's left vertical edge from the background position layer's left vertical edge. (Some browsers allow assigning the right edge for offset).
<percentage>
The offset of the given background image's horizontal position relative to the container. A value of 0% means that the left edge of the background image is aligned with the left edge of the container, and a value of 100% means that the right edge of the background image is aligned with the right edge of the container, thus a value of 50% horizontally centers the background image.

Formal definition

Valor inicialleft
Applies toall elements
Heredableno
Percentagesrefer to width of background positioning area minus height of background image
Valor calculadoA list, each item consisting of: an offset given as a combination of an absolute length and a percentage, plus an origin keyword
Animation typediscrete

Formal syntax

[ center | [ [ left | right | x-start | x-end ]? <length-percentage>? ]! ]#

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

Examples

Basic example

The following example shows a simple background image implementation, with background-position-x and background-position-y used to define the image's horizontal and vertical positions separately.

HTML

<div></div>

CSS

div {
  width: 300px;
  height: 300px;
  background-color: skyblue;
  background-image: url(https://media.prod.mdn.mozit.cloud/attachments/2020/07/29/17350/3b4892b7e820122ac6dd7678891d4507/firefox.png);
  background-repeat: no-repeat;
  background-position-x: center;
  background-position-y: bottom 10px;
}

Result

Specifications

Specification Status Comment
CSS Backgrounds and Borders Module Level 4
La definición de 'background-position-x' en esta especificación.
Editor's Draft Initial specification of longhand sub-properties of background-position to match longstanding implementations.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome para AndroidFirefox para AndroidOpera para AndroidSafari en iOSSamsung Internet
background-position-xChrome Soporte completo 1Edge Soporte completo 12Firefox Soporte completo 49IE Soporte completo 6Opera Soporte completo 15Safari Soporte completo 1WebView Android Soporte completo ≤37Chrome Android Soporte completo 18Firefox Android Soporte completo 49Opera Android Soporte completo 18Safari iOS Soporte completo 1Samsung Internet Android Soporte completo 1.0
Two-value syntax (support for offsets from any edge)Chrome Sin soporte NoEdge Sin soporte 12 — 79Firefox Soporte completo 49IE Soporte completo 9Opera Sin soporte NoSafari Sin soporte NoWebView Android Sin soporte NoChrome Android Sin soporte NoFirefox Android Soporte completo 49Opera Android Sin soporte NoSafari iOS Sin soporte NoSamsung Internet Android Sin soporte No

Leyenda

Soporte completo  
Soporte completo
Sin soporte  
Sin soporte

See also