background-attachment

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Summary

If a background-image is specified, the background-attachment CSS property determines whether that image's position is fixed within the viewport, or scrolls along with its containing block.

Начальное значениеscroll
Применяется квсе элементы. Это также применяется к ::first-letter и ::first-line.
Наследуетсянет
Отображениевизуальный
Обработка значениякак указано
Анимируемостьнет
Канонический порядокуникальный не однозначный порядок, определённый формальной грамматикой

Syntax

<attachment>#

where
<attachment> = scroll | fixed | local

Values

fixed
This keyword means that the background is fixed with regard to the viewport. Even if an element has a scrolling mechanism, a ‘fixed’ background doesn't move with the element.
local
This keyword means that the background is fixed with regard 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
This keyword means that the background is fixed with regard to the element itself and does not scroll with its contents. (It is effectively attached to the element's border.)

Examples

Simple example

CSS

p {
  background-image: url("https://mdn.mozillademos.org/files/12057/starsolid.gif");
  background-attachment: fixed;
}

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>

Result

Multiple background image support

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.

CSS

p {
  background-image: url("https://mdn.mozillademos.org/files/12057/starsolid.gif"), url("https://mdn.mozillademos.org/files/12059/startransparent.gif");
  background-attachment: fixed, scroll;
  background-repeat: no-repeat, repeat-y;
}

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>

Result

Specifications

Specification Status Comment
CSS Backgrounds and Borders Module Level 3
Определение 'background-attachment' в этой спецификации.
Кандидат в рекомендации The shorthand property has been extended to support multiple backgrounds and the local value.
CSS Level 2 (Revision 1)
Определение 'background-attachment' в этой спецификации.
Рекомендация No significant change.
CSS Level 1
Определение 'background-attachment' в этой спецификации.
Рекомендация  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 1.0 1.0 (1.7 или ранее) 4.0 3.5 1.0
Multiple backgrounds 1.0 3.6 (1.9.2) 9.0 10.5 1.3
local 4.0 Нет 9.0 10.5 5.0
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 2.1 1.0 (1.9.2) ? 10.0 3.2
Multiple backgrounds 2.1 1.0 (1.9.2) ? 10.0 3.2
local ? Нет ? ? ?

See also

Метки документа и участники

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