shape-outside
The shape-outside
CSS property defines a shape—which may be non-rectangular—around which adjacent inline content should wrap. By default, inline content wraps around its margin box; shape-outside
provides a way to customize this wrapping, making it possible to wrap text around complex objects rather than simple boxes.
Try it
Syntax
/* 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);
/* Shape box with basic shape */
shape-outside: circle() border-box;
shape-outside: margin-box ellipse();
/* <url> value */
shape-outside: url(image.png);
/* <gradient> value */
shape-outside: linear-gradient(45deg, #fff 150px, red 150px);
/* Global values */
shape-outside: inherit;
shape-outside: initial;
shape-outside: revert;
shape-outside: revert-layer;
shape-outside: unset;
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 an
inset()
,circle()
,ellipse()
, orpolygon()
function; other<basic-shape>
functions are invalid. 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: If the image is invalid, the effect is as if the keyword none
had been specified. Additionally, the image must be served with CORS headers allowing its use.
Formal definition
Initial value | none |
---|---|
Applies to | floats |
Inherited | no |
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 |
Formal syntax
shape-outside =
none |
[ <basic-shape> || <shape-box> ] |
<image>
<shape-box> =
<visual-box> |
margin-box
<image> =
<url> |
<gradient>
<visual-box> =
content-box |
padding-box |
border-box
<url> =
<url()> |
<src()>
<url()> =
url( <string> <url-modifier>* ) |
<url-token>
<src()> =
src( <string> <url-modifier>* )
Examples
Funneling text
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 {
background-color: lightgray;
height: 12ex;
width: 40%;
}
.left {
clip-path: polygon(0 0, 100% 100%, 0 100%);
float: left;
shape-outside: polygon(0 0, 100% 100%, 0 100%);
}
.right {
clip-path: polygon(100% 0, 100% 100%, 0 100%);
float: right;
shape-outside: polygon(100% 0, 100% 100%, 0 100%);
}
p {
text-align: center;
}
Result
Specifications
Specification |
---|
CSS Shapes Module Level 1 # shape-outside-property |
Browser compatibility
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