repeating-radial-gradient()
CSS
function
creates an image consisting of repeating gradients that radiate from an origin. It is similar to
radial-gradient()
and takes the same arguments, but it repeats the color stops infinitely in all directions so as to cover its entire container, similar to
repeating-linear-gradient()
. The function's result is an object of the
<gradient>
data type, which is a special kind of
<image>
.
With each repetition, the positions of the color stops are shifted by a multiple of the dimensions of the basic radial gradient (the distance between the last color stop and the first). Thus, the position of each ending color stop coincides with a starting color stop; if the color values are different, this will result in a sharp visual transition, which can be mitigated by repeating the first color as the last color.
As with any gradient, a repeating radial gradient has no intrinsic dimensions ; i.e., it has no natural or preferred size, nor a preferred ratio. Its concrete size will match the size of the element it applies to.
因为
<gradient>
s belong to the
<image>
data type, they can only be used where
<image>
s can be used. For this reason,
repeating-radial-gradient()
won't work on
background-color
and other properties that use the
<color>
data type.
/* A gradient at the center of its container, starting red, changing to blue, and finishing green, with the colors repeating every 30px */ repeating-radial-gradient(circle at center, red 0, blue, green 30px); /* An elliptical gradient near the top left of its container, starting red, changing to green and back again, repeating five times between the center and the bottom right corner, and only once between the center and the top left corner */ repeating-radial-gradient(farthest-corner at 20% 20%, red 0, green, red 20%);
<position>
background-position
or
transform-origin
. If unspecified, it defaults to
center
.
<shape>
circle
(meaning that the gradient's shape is a circle with constant radius) or
ellipse
(meaning that the shape is an axis-aligned ellipse). If unspecified, it defaults to
ellipse
.
<extent-keyword>
A keyword describing how big the ending shape must be. The possible values are:
| Keyword | 描述 |
|---|---|
closest-side
|
The gradient's ending shape meets the side of the box closest to its center (for circles) or meets both the vertical and horizontal sides closest to the center (for ellipses). |
closest-corner
|
The gradient's ending shape is sized so that it exactly meets the closest corner of the box from its center. |
farthest-side
|
类似于
closest-side
, except the ending shape is sized to meet the side of the box farthest from its center (or vertical and horizontal sides).
|
farthest-corner
|
The gradient's ending shape is sized so that it exactly meets the farthest corner of the box from its center. |
注意：
Early implementations of this function included other keywords (
cover
and
contain
) as synonyms of the standard
farthest-corner
and
closest-side
, respectively. Use the standard keywords only, as some implementations have already dropped those older variants.
<color-stop>
<color>
value, followed by an optional stop position (either a
<percentage>
或
<length>
along the gradient's axis). A percentage of
0%
, or a length of
0
, represents the center of the gradient; the value
100%
represents the intersection of the ending shape with the virtual gradient ray. Percentage values in between are linearly positioned on the virtual gradient ray.
repeating-radial-gradient(
[[ circle || <length> ] [at <position>]? , |
[ ellipse || [<length> | <percentage> ]{2}] [at <position>]? , |
[[ circle | ellipse ] || <extent-keyword> ] [at <position>]? , |
at <position> , <color-stop-list> )
\---------------------------------------------------------------/\-----------------/
Contour, size and position of the ending shape List of color stops
where <extent-keyword> = closest-corner | closest-side | farthest-corner | farthest-side
and <color-stop-list> = [ <linear-color-stop> [, <color-hint>? ]? ]#, <linear-color-stop>
and <linear-color-stop> = <color> [ <color-stop-length> ]?
and <color-stop-length> = [ <percentage> | <length> ]{1,2}
and <color-hint> = [ <percentage> | <length> ]
<div class="radial-gradient"></div>
.radial-gradient {
width: 120px;
height: 120px;
}
.radial-gradient {
background: repeating-radial-gradient(black, black 5px, white 5px, white 10px);
}
<div class="radial-gradient"></div>
.radial-gradient {
width: 240px;
height: 120px;
}
.radial-gradient {
background: repeating-radial-gradient(ellipse farthest-corner at 20% 20%,
red, black 5%, blue 5%, green 10%);
background: repeating-radial-gradient(ellipse farthest-corner at 20% 20%,
red 0 5%, green 5% 10%);
}
The elliptical gradient will be centered 20% from the top left, and will repeat 10 times between the center and the farthest corner (the bottom right corner). Browsers supporting multi position color stops will display a red and green striped ellipse. Browsers not supporting the syntax yet will see a gradient that goes from red to black and then from blue to green.
注意： Please see Using CSS gradients 了解更多范例。
| 规范 | 状态 | 注释 |
|---|---|---|
|
CSS Images Module Level 3
The definition of 'repeating-radial-gradient()' in that specification. |
候选推荐 | 初始定义。 |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
repeating-radial-gradient()
|
Chrome 完整支持 26 | Edge 完整支持 12 |
Firefox
完整支持
16
注意事项
|
IE 完整支持 10 |
Opera
完整支持
12.1
|
Safari
完整支持
6.1
|
WebView Android 完整支持 4.4 | Chrome Android 完整支持 26 |
Firefox Android
完整支持
16
注意事项
|
Opera Android
完整支持
12.1
|
Safari iOS
完整支持
7
|
Samsung Internet Android 完整支持 1.5 |
at
syntax
|
Chrome 完整支持 26 | Edge 完整支持 12 |
Firefox
完整支持
16
注意事项
|
IE 完整支持 10 |
Opera
完整支持
15
|
Safari 不支持 No | WebView Android 完整支持 ≤37 | Chrome Android 完整支持 26 |
Firefox Android
完整支持
16
注意事项
|
Opera Android
完整支持
14
|
Safari iOS 不支持 No | Samsung Internet Android 完整支持 1.5 |
| Double-position color stops | Chrome 完整支持 71 | Edge 完整支持 79 | Firefox 完整支持 64 | IE 不支持 No | Opera 完整支持 58 | Safari 完整支持 12.1 | WebView Android 完整支持 71 | Chrome Android 完整支持 71 | Firefox Android 完整支持 64 | Opera Android 完整支持 50 | Safari iOS 完整支持 12.2 | Samsung Internet Android 完整支持 10.0 |
| Interpolation Hints / Gradient Midpoints | Chrome 完整支持 40 | Edge 完整支持 79 | Firefox 完整支持 36 | IE 不支持 No | Opera 完整支持 27 | Safari 完整支持 6.1 | WebView Android 完整支持 40 | Chrome Android 完整支持 40 | Firefox Android 完整支持 46 | Opera Android 完整支持 27 | Safari iOS 完整支持 7 | Samsung Internet Android 完整支持 4.0 |
完整支持
不支持
见实现注意事项。
用户必须明确启用此特征。
要求使用供应商前缀或不同名称。
radial-gradient()
,
linear-gradient()
,
repeating-linear-gradient()
,
conic-gradient()
,
repeating-conic-gradient()
<image>
image()
element()
image-set()
cross-fade()