This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The shape-outside
CSS property defines a shape around which inline content should wrap. By default, inline content wraps around its margin box.
/* Keyword values */ shape-outside: none; shape-outside: margin-box; shape-outside: content-box; shape-outside: border-box; shape-outside: padding-box; /* Function values */ shape-outside: circle(); shape-outside: ellipse(); shape-outside: inset(10px 10px 10px 10px); shape-outside: polygon(10px 10px, 20px 20px, 30px 30px); /* <url> value */ shape-outside: url(image.png); /* <gradient> value */ shape-outside: linear-gradient(45deg, rgba(255, 255, 255, 0) 150px, red 150px); /* Global values */ shape-outside: initial; shape-outside: inherit; shape-outside: unset;
Initial value | none |
---|---|
Applies to | floats |
Inherited | no |
Media | visual |
Computed value | as defined for <basic-shape> (with <shape-box> following, if supplied), the <image> with its URI made absolute, otherwise as specified. |
Animation type | yes, as specified for <basic-shape> , otherwise no |
Canonical order | the unique non-ambiguous order defined by the formal grammar |
Syntax
The shape-outside
property is specified using the values from the list below, which define the float area for float elements. The float area determines the shape around which inline content (float elements) wrap.
Values
none
- The float area is unaffected. Inline content wraps around the element's margin box, like usual.
<shape-box>
- The float area is computed according to the shape of a float element's edges (as defined by the CSS box model). This can be
margin-box
,border-box
,padding-box
, orcontent-box
. The shape includes any curvature created by theborder-radius
property (behavior which is similar tobackground-clip
). -
margin-box
- Defines the shape enclosed by the outside margin edge. The corner radii of this shape are determined by the corresponding
border-radius
andmargin
values. If theborder-radius / margin
ratio is1
or more, then the margin box corner radius isborder-radius + margin
. If the ratio is less than1
, then the margin box corner radius isborder-radius + (margin * (1 + (ratio-1)^3))
. border-box
-
Defines the shape enclosed by the outside border edge. The shape follows the normal border radius shaping rules for the outside of the border.
padding-box
-
Defines the shape enclosed by the outside padding edge. The shape follows the normal border radius shaping rules for the inside of the border.
content-box
-
Defines the shape enclosed by the outside content edge. Each corner radius of this box is the larger of
0
orborder-radius - border-width - padding
.
<basic-shape>
- The float area is computed based on the shape created by of one of
inset()
,circle()
,ellipse()
, orpolygon()
. If a<shape-box>
is also supplied, it defines the reference box for the<basic-shape>
function. Otherwise, the reference box defaults tomargin-box
. <image>
- The float area is extracted and computed based on the alpha channel of the specified
<image>
as defined byshape-image-threshold
. -
Note: User agents must use the potentially CORS-enabled fetch method defined by the HTML5 specification for all URLs in a
shape-outside
value. When fetching, user agents must use "Anonymous" mode, set the referrer source to the stylesheet's URL, and set the origin to the URL of the containing document. If this results in network errors such that there is no valid fallback image, the effect is as if the valuenone
had been specified.
Formal syntax
none | <shape-box> || <basic-shape> | <image>where
<shape-box> = <box> | margin-box
<basic-shape> = <inset()> | <circle()> | <ellipse()> | <polygon()>
<image> = <url> | <image()> | <image-set()> | <element()> | <cross-fade()> | <gradient>where
<box> = border-box | padding-box | content-box
<inset()> = inset( <length-percentage>{1,4} [ round <border-radius> ]? )
<circle()> = circle( [ <shape-radius> ]? [ at <position> ]? )
<ellipse()> = ellipse( [ <shape-radius>{2} ]? [ at <position> ]? )
<polygon()> = polygon( <fill-rule>? , [ <length-percentage> <length-percentage> ]# )
<image()> = image( [ [ <image> | <string> ]? , <color>? ]! )
<image-set()> = image-set( <image-set-option># )
<element()> = element( <id-selector> )
<cross-fade()> = cross-fade( <cf-mixing-image> , <cf-final-image>? )
<gradient> = <linear-gradient()> | <repeating-linear-gradient()> | <radial-gradient()> | <repeating-radial-gradient()>where
<length-percentage> = <length> | <percentage>
<shape-radius> = <length-percentage> | closest-side | farthest-side
<position> = [[ left | center | right | top | bottom | <length-percentage> ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ] | [ center | [ left | right ] <length-percentage>? ] && [ center | [ top | bottom ] <length-percentage>? ]]
<fill-rule> = nonzero | evenodd
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>
<image-set-option> = [ <image> | <string> ] <resolution>
<cf-mixing-image> = <percentage>? && <image>
<cf-final-image> = <image> | <color>
<linear-gradient()> = linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )
<repeating-linear-gradient()> = repeating-linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )
<radial-gradient()> = radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )
<repeating-radial-gradient()> = repeating-radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )where
<rgb()> = rgb( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<rgba()> = rgba( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<hsl()> = hsl( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
<hsla()> = hsla( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
<side-or-corner> = [ left | right ] || [ top | bottom ]
<color-stop-list> = <color-stop>#{2,}
<ending-shape> = circle | ellipse
<size> = closest-side | farthest-side | closest-corner | farthest-corner | <length> | <length-percentage>{2}where
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>
<color-stop> = <color> <length-percentage>?
Interpolation
When animating between one <basic-shape>
and a second, the rules below are applied. The values in the shape functions interpolate as a simple list. The list values interpolate as <length>
, <percentage>
, or calc()
where possible. If list values are not one of those types but are identical (such as finding nonzero
in the same list position in both lists), those values do interpolate.
- Both shapes must use the same reference box.
- If both shapes are the same type, that type is
ellipse()
orcircle()
, and none of the radii use theclosest-side
orfarthest-side
keywords, interpolate between each value in the shape functions. - If both shapes are of type
inset()
, interpolate between each value in the shape functions. - If both shapes are of type
polygon()
, both polygons have the same number of vertices, and use the same<fill-rule>
, interpolate between each value in the shape functions. - In all other cases no interpolation occurs.
Example
HTML
<div class="main"> <div class="left"></div> <div class="right"></div> <p> Sometimes a web page's text content appears to be funneling your attention towards a spot on the page to drive you to follow a particular link. Sometimes you don't notice. </p> </div>
CSS
.main { width: 530px; } .left, .right { width: 40%; height: 12ex; background-color: lightgray; } .left { -webkit-shape-outside: polygon(0 0, 100% 100%, 0 100%); shape-outside: polygon(0 0, 100% 100%, 0 100%); float: left; -webkit-clip-path: polygon(0 0, 100% 100%, 0 100%); clip-path: polygon(0 0, 100% 100%, 0 100%); } .right { -webkit-shape-outside: polygon(100% 0, 100% 100%, 0 100%); shape-outside: polygon(100% 0, 100% 100%, 0 100%); float: right; -webkit-clip-path: polygon(100% 0, 100% 100%, 0 100%); clip-path: polygon(100% 0, 100% 100%, 0 100%); } p { text-align: center; }
Result
Specifications
Specification | Status | Comment |
---|---|---|
CSS Shapes Module Level 1 The definition of 'shape-outside' in that specification. |
Candidate Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 37 | ? | 531 2 | No | 24 | 8 -webkit- |
<gradient> | ? | ? | No | No | No | ? |
inset() | ? | ? | 543 | No | No | ? |
polygon() | ? | ? | 554 | No | ? | ? |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
---|---|---|---|---|---|---|---|
Basic support | ? | ? | ? | 531 2 | No | 24 | 8 -webkit- |
<gradient> | No | ? | ? | No | No | ? | ? |
inset() | No | ? | ? | 543 | No | No | ? |
polygon() | No | ? | ? | 554 | No | ? | ? |
1. Firefox only supports values <shape-box>
, circle()
, and ellipse()
.
2. From version 53: this feature is behind the layout.css.shape-outside.enabled
preference (needs to be set to true
). To change preferences in Firefox, visit about:config.
3. From version 54: this feature is behind the layout.css.shape-outside.enabled
preference (needs to be set to true
). To change preferences in Firefox, visit about:config.
4. From version 55: this feature is behind the layout.css.shape-outside.enabled
preference (needs to be set to true
). To change preferences in Firefox, visit about:config.