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.

skewY(a) 

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 ℝ^2	Homogeneous coordinates on ℝℙ^2	Cartesian coordinates on ℝ^3	Homogeneous coordinates on ℝℙ^3
( 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
CSS Transforms Module Level 1 # funcdef-transform-skewy

See also

transform <transform-function>

Last modified: Jan 31, 2022, by MDN contributors

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