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.
Die background-attachment CSS-Eigenschaft legt fest, ob die Position eines Hintergrundbilds innerhalb des Viewports festgelegt ist oder mit seinem enthaltenen Block scrollt.
Probieren Sie es aus
background-attachment: scroll;
background-attachment: fixed;
background-attachment: local;
background-attachment: local, scroll;
background-attachment: scroll, local;
<section id="default-example">
<div id="example-element">
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
/* 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 background-attachment-Eigenschaft wird als eines der Schlüsselwortwerte aus der untenstehenden Liste angegeben.
Werte
fixed-
Der Hintergrund ist relativ zum Viewport fest. Selbst wenn ein Element einen Bildlaufmechanismus hat, bewegt sich der Hintergrund nicht mit dem Element.
local-
Der Hintergrund ist relativ zu den Inhalten des Elements fest. Wenn das Element einen Bildlaufmechanismus hat, scrollt der Hintergrund mit den Inhalten des Elements, und der Hintergrunddarstellungsbereich und der Hintergrundpositionierungsbereich sind relativ zum scrollbaren Bereich des Elements und nicht zum Rahmen, der sie umgibt.
scroll-
Der Hintergrund ist relativ zum Element selbst fest und scrollt nicht mit den Inhalten. (Er ist effektiv an den Rahmen des Elements angehängt.)
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
<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("star-solid.gif");
background-attachment: fixed;
}
Ergebnis
Mehrere Hintergrundbilder
Diese Eigenschaft unterstützt mehrere Hintergrundbilder. Sie können für jedes Hintergrundbild ein anderes <attachment> angeben, getrennt durch Kommata. Jedes Bild wird mit dem entsprechenden <attachment>-Typ von zuerst angegeben bis zuletzt übereinstimmend.
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("star-solid.gif"), url("star-transparent.gif");
background-attachment: fixed, scroll;
background-repeat: no-repeat, repeat-y;
}
Ergebnis
Spezifikationen
| Specification |
|---|
| CSS Backgrounds and Borders Module Level 3 # background-attachment |
Browser-Kompatibilität
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