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background-position-y

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 value	`top`
Applies to	all elements
Inherited	no
Percentages	refer to height of background positioning area minus height of background image
Media	visual
Computed value	A list, each item consisting of: an offset given as a combination of an absolute length and a percentage, plus an origin keyword
Animation type	discrete
Canonical order	the unique non-ambiguous order defined by the formal grammar

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	12	49	6	Yes	Yes
Two-value syntax (support for offsets from any edge)	No	12	49	9	No	No