skew() CSS function

The skew() CSS function defines a transformation that skews an element on the 2D plane. Its result is a <transform-function> data type.

Try it

transform: skew(0);
transform: skew(15deg, 15deg);
transform: skew(-0.06turn, 18deg);
transform: skew(0.312rad);
<section id="default-example">
  <img
    class="transition-all"
    id="example-element"
    src="/shared-assets/images/examples/firefox-logo.svg"
    width="200" />
</section>

This transformation is a shear mapping (transvection) that distorts each point within an element by a certain angle in the horizontal and vertical directions. The effect is as if you grabbed each corner of the element and pulled them along a certain angle.

The coordinates of each point are modified by a value proportionate to the specified angle and the distance to the origin. Thus, the farther from the origin a point is, the greater the value added to it.

Syntax

css
skew(ax)

skew(ax, ay)

Values

ax

Is an <angle> representing the angle to use to distort the element along the x-axis.

ay Optional

Is an <angle> representing the angle to use to distort the element along the y-axis. If not defined, its default value is 0, resulting in a purely horizontal skewing.

Cartesian coordinates on ℝ^2Homogeneous coordinates on ℝℙ^2Cartesian coordinates on ℝ^3Homogeneous coordinates on ℝℙ^3
(1tan(ax)tan(ay)1)\left( \begin{array}{cc} 1 & \tan(ax) \\ \tan(ay) & 1 \end{array} \right)
(1tan(ax)0tan(ay)10001)\left( \begin{array}{ccc} 1 & \tan(ax) & 0 \\ \tan(ay) & 1 & 0 \\ 0 & 0 & 1 \end{array} \right)
(1tan(ax)0tan(ay)10001)\left( \begin{array}{ccc} 1 & \tan(ax) & 0 \\ \tan(ay) & 1 & 0 \\ 0 & 0 & 1 \end{array} \right)
(1tan(ax)00tan(ay)10000100001)\left( \begin{array}{cccc} 1 & \tan(ax) & 0 & 0 \\ \tan(ay) & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array} \right)
[1 tan(ay) tan(ax) 1 0 0]

Formal syntax

<skew()> = 
  skew( [ <angle> | <zero> ] , [ <angle> | <zero> ]? )

Examples

undefined

Skewing on the x-axis only

HTML

html
<div>Normal</div>
<div class="skewed">Skewed</div>

CSS

css
body {
  margin: 20px;
}

div {
  width: 80px;
  height: 80px;
  background-color: skyblue;
}

.skewed {
  transform: skew(10deg); /* Equal to skewX(10deg) */
  background-color: pink;
}

Result

Skewing on both axes

HTML

html
<div>Normal</div>
<div class="skewed">Skewed</div>

CSS

css
body {
  margin: 20px;
}

div {
  width: 80px;
  height: 80px;
  background-color: skyblue;
}

.skewed {
  transform: skew(10deg, 10deg);
  background-color: pink;
}

Result

Specifications

See also