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skew()

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

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

The skew() function is specified with either one or two values, which represent the amount of skewing to be applied in each direction. If you only specify one value it is used for the x-axis and there will be no skewing on the y-axis.

skew(ax)

skew(ax, ay)

Values

ax
Is an <angle> representing the angle to use to distort the element along the x-axis (or abscissa).
ay
Is an <angle> representing the angle to use to distort the element along the y-axis (or ordinate). If not defined, its default value is 0, resulting in a purely horizontal skewing.
Cartesian coordinates on ℝ2 Homogeneous coordinates on ℝℙ2 Cartesian coordinates on ℝ3 Homogeneous coordinates on ℝℙ3
1tan(ax)tan(ay)1 1tan(ax)0tan(ay)10001 1tan(ax)0tan(ay)10001 1tan(ax)00tan(ay)10000100001
[1 tan(ay) tan(ax) 1 0 0]

Examples

Skewing on the x-axis only

HTML

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

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

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

CSS

body {
  margin: 20px;
}

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

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

Result

Specifications

Specification Status Comment
CSS Transforms Level 1
The definition of 'skew()' in that specification.
Working Draft Initial definition

Browser compatibility

Please see the <transform-function> data type for compatibility info.

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function/skew