background-position-x
Quick Summary for background-position-x
The background-position-x CSS property sets the initial horizontal position for each background image. The position is relative to the position layer set by background-origin.
Code Usage for background-position-x
/* 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: revert; background-position-x: unset; 
More Details for background-position-x

background-position-x

The background-position-x CSS property sets the initial horizontal position for each background image. The position is relative to the position layer set by 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: revert; 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

Initial valueleft
Applies toall elements
Inheritedno
Percentagesrefer to width of background positioning area minus height of background image
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

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
CSS Backgrounds and Borders Module Level 4 # background-position-longhands

See also

background-position background-position-y background-position-inline background-position-block Using multiple backgrounds Select your preferred language English (US)Français日本語Русский中文 (简体) Change language

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