skewY()

The skewY() CSS function defines a transformation that skews an element in the vertical direction 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 vertical direction. The ordinate coordinate of each point is 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 will be the value added it.

Syntax

skewY(a)

Values

a
Is an <angle> representing the angle to use to distort the element along the ordinate.
Cartesian coordinates on ℝ2 Homogeneous coordinates on ℝℙ2 Cartesian coordinates on ℝ3 Homogeneous coordinates on ℝℙ3
1 0 tan ( a ) 1 1 0 0 tan ( a ) 1 0 0 0 1 1 0 0 tan ( a ) 1 0 0 0 1 1 0 0 0 tan ( a ) 1 0 0 0 0 1 0 0 0 0 1
[1 tan(a) 0 1 0 0]

Examples

HTML

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

CSS

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

.skewed {
  transform: skewY(40deg);
  background-color: pink;
}

Result

Specifications

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

Browser compatibility

BCD tables only load in the browser

See also