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.The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

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} |
---|---|---|---|

$\left(\begin{array}{c}10\\ tan(ax)1\end{array}\right)$ | $\left(\begin{array}{cc}10& 0\\ tan(ax)1& 0\\ 0& 0& 1\end{array}\right)$ | $\left(\begin{array}{cc}10& 0\\ tan(ax)1& 0\\ 0& 0& 1\end{array}\right)$ | $\left(\begin{array}{ccc}10& 0& 0\\ tan(ax)1& 0& 0\\ 0& 0& 1& 0\\ 0& 0& 0& 1\end{array}\right)$ |

`[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

## Browser compatibility

Please see the `<transform-function>`

data type for compatibility info.