background-attachment

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨Juli 2015⁩.

Diebackground-attachment-Eigenschaft vonCSS legt fest, ob die Position eines Hintergrundbilds innerhalb desViewports fest ist oder mit seinem umgebenden Block scrollt.

Probieren Sie es aus

background-attachment: scroll;

background-attachment: fixed;

background-attachment: local;

background-attachment: local, scroll;

background-attachment: scroll, local;

<section>  <div>    London. Michaelmas term lately over, and the Lord Chancellor sitting in    Lincoln's Inn Hall. Implacable November weather. As much mud in the streets    as if the waters had but newly retired from the face of the earth, and it    would not be wonderful to meet a Megalosaurus, forty feet long or so,    waddling like an elephantine lizard up Holborn Hill. London. Michaelmas term    lately over, and the Lord Chancellor sitting in Lincoln's Inn Hall.    Implacable November weather. As much mud in the streets as if the waters had    but newly retired from the face of the earth, and it would not be wonderful    to meet a Megalosaurus, forty feet long or so, waddling like an elephantine    lizard up Holborn Hill.  </div></section>

body {  overflow: scroll;}#default-example {  height: 600px;}#example-element {  max-width: 20rem;  height: 100%;  background:    url("/shared-assets/images/examples/lizard.png") right 3rem top 1rem / 15rem      no-repeat,    url("/shared-assets/images/examples/moon.jpg") center / 10rem;  color: #ff5454;  font-size: 1.5em;  font-weight: bold;  overflow: auto;  padding: 20px;  text-shadow:    0 0 0.6rem black,    0 0 0.6rem black;}

Syntax

css

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

Die Eigenschaftbackground-attachment wird als einer der Schlüsselwortwerte aus der unten stehenden Liste angegeben.

Werte

fixed: Der Hintergrund ist relativ zum Viewport fixiert. Selbst wenn ein Element einen Scroll-Mechanismus hat, bewegt sich der Hintergrund nicht mit dem Element.
local: Der Hintergrund ist relativ zum Inhalt des Elements fixiert. Wenn das Element einen Scroll-Mechanismus hat, scrollt der Hintergrund mit dem Inhalt des Elements, und der Hintergrund-Malbereich sowie der Hintergrund-Positionierungsbereich sind relativ zum scrollbaren Bereich des Elements, anstatt zum Rahmen, der ihn umgibt.
scroll: Der Hintergrund ist relativ zum Element selbst fixiert und scrollt nicht mit seinem Inhalt. (Er ist quasi an den Rahmen des Elements angebracht.)

Formale Definition

Anfangswert	`scroll`
Anwendbar auf	alle Elemente. Auch anwendbar auf`::first-letter` und`::first-line`.
Vererbt	Nein
Berechneter Wert	wie angegeben
Animationstyp	diskret

Formale Syntax

background-attachment =
<attachment>#

<attachment> =
scroll|
fixed|
local

Beispiele

Einfaches Beispiel

HTML

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

css

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

Ergebnis

Diese Eigenschaft unterstützt mehrere Hintergrundbilder. Sie können für jeden Hintergrund einen anderen<attachment>-Wert angeben, getrennt durch Kommata. Jedes Bild wird mit dem entsprechenden<attachment>-Typ von der zuerst angegebenen zur zuletzt angegebenen gematcht.

HTML

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

css

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