The background-attachment CSS property sets whether a background image's position is fixed within the viewport, or scrolls with its containing block.

/* Keyword values */ background-attachment: scroll; background-attachment: fixed; background-attachment: local;  /* Global values */ background-attachment: inherit; background-attachment: initial; background-attachment: revert; background-attachment: unset; 

background-attachment

The background-attachment CSS property sets whether a background image's position is fixed within the viewport, or scrolls with its containing block.

Syntax

/* Keyword values */ background-attachment: scroll; background-attachment: fixed; background-attachment: local;  /* Global values */ background-attachment: inherit; background-attachment: initial; background-attachment: revert; background-attachment: unset; 

The background-attachment property is specified as one of the keyword values from the list below.

Values

fixed

The background is fixed relative to the viewport. Even if an element has a scrolling mechanism, the background doesn't move with the element. (This is not compatible with background-clip: text.)

local

The background is fixed relative to the element's contents. If the element has a scrolling mechanism, the background scrolls with the element's contents, and the background painting area and background positioning area are relative to the scrollable area of the element rather than to the border framing them.

scroll

The background is fixed relative to the element itself and does not scroll with its contents. (It is effectively attached to the element's border.)

Formal definition

Initial value	scroll
Applies to	all elements. It also applies to ::first-letter and ::first-line.
Inherited	no
Computed value	as specified
Animation type	discrete

Formal syntax

<attachment>#
where <attachment> = scroll | fixed | local

Examples

Simple example

HTML

<p>   There were doors all round the hall, but they were all locked; and when   Alice had been all the way down one side and up the other, trying every   door, she walked sadly down the middle, wondering how she was ever to   get out again. </p> 

CSS

p {   background-image: url("starsolid.gif");   background-attachment: fixed; } 

Result

Multiple background images

This property supports multiple background images. You can specify a different <attachment> for each background, separated by commas. Each image is matched with the corresponding <attachment> type, from first specified to last.

HTML

<p>   There were doors all round the hall, but they were all locked; and when   Alice had been all the way down one side and up the other, trying every   door, she walked sadly down the middle, wondering how she was ever to   get out again.    Suddenly she came upon a little three-legged table, all made of solid   glass; there was nothing on it except a tiny golden key, and Alice's   first thought was that it might belong to one of the doors of the hall;   but, alas! either the locks were too large, or the key was too small,   but at any rate it would not open any of them. However, on the second   time round, she came upon a low curtain she had not noticed before, and   behind it was a little door about fifteen inches high: she tried the   little golden key in the lock, and to her great delight it fitted! </p> 

CSS

p {   background-image: url("starsolid.gif"),       url("startransparent.gif");   background-attachment: fixed, scroll;   background-repeat: no-repeat, repeat-y; } 

Result

Specifications

Specification
CSS Backgrounds and Borders Module Level 4 # the-background-attachment

See also

Using multiple backgrounds

Last modified: Aug 12, 2021, by MDN contributors

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