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---
title: skewX()
slug: Web/CSS/transform-function/skewX
page-type: css-function
browser-compat: css.types.transform-function.skewX
---
{{CSSRef}}
The **`skewX()`** [CSS](/en-US/docs/Web/CSS) [function](/en-US/docs/Web/CSS/CSS_Functions) defines a transformation that skews an element in the
horizontal direction on the 2D plane. Its result is a {{cssxref("<transform-function>")}} data type.
{{EmbedInteractiveExample("pages/css/function-skewX.html")}}
This transformation is a shear mapping ([transvection](https://en.wikipedia.org/wiki/Shear_mapping)) that distorts
each point within an element by a certain angle in the horizontal direction. The abscissa (horizontal, x-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.
> **Note:** `skewX(a)` is equivalent to
> `skew(a)`.
## Syntax
```css
skewX(a)
```
### Values
- `a`
- : Is an {{cssxref("<angle>")}} representing the angle to use to distort the element along the abscissa (horizontal, x-coordinate).
<table class="standard-table">
<thead>
<tr>
<th scope="col"><a href="/en-US/docs/Web/CSS/transform-function#cartesian_coordinates">Cartesian coordinates</a> on <a href="https://en.wikipedia.org/wiki/Real_coordinate_space">ℝ^2</a></th>
<th scope="col"><a href="https://en.wikipedia.org/wiki/Homogeneous_coordinates">Homogeneous coordinates</a> on <a href="https://en.wikipedia.org/wiki/Real_projective_plane">ℝℙ^2</a></th>
<th scope="col">Cartesian coordinates on <a href="https://en.wikipedia.org/wiki/Real_coordinate_space">ℝ^3</a></th>
<th scope="col">Homogeneous coordinates on <a href="https://en.wikipedia.org/wiki/Real_projective_space">ℝℙ^3</a></th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="2">
<math
><mrow><mo>(</mo
><mtable
><mtr
><mtd><mn>1</mn> </mtd
><mtd
><mo>tan</mo>
<mo>(</mo>
<mi>a</mi>
<mo>)</mo>
</mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>1</mn></mtd></mtr
></mtable
><mo>)</mo></mrow
></math
>
</td>
<td>
<math
><mrow><mo>(</mo
><mtable
><mtr
><mtd><mn>1</mn> </mtd
><mtd
><mo>tan</mo>
<mo>(</mo>
<mi>a</mi>
<mo>)</mo> </mtd
><mtd><mn>0</mn> </mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>1</mn> </mtd
><mtd><mn>0</mn> </mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>0</mn> </mtd
><mtd><mn>1</mn></mtd></mtr
></mtable
><mo>)</mo></mrow
></math
>
</td>
<td rowspan="2">
<math
><mrow><mo>(</mo
><mtable
><mtr
><mtd><mn>1</mn> </mtd
><mtd
><mo>tan</mo>
<mo>(</mo>
<mi>a</mi>
<mo>)</mo> </mtd
><mtd><mn>0</mn> </mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>1</mn> </mtd
><mtd><mn>0</mn> </mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>0</mn> </mtd
><mtd><mn>1</mn></mtd></mtr
></mtable
><mo>)</mo></mrow
></math
>
</td>
<td rowspan="2">
<math
><mrow><mo>(</mo
><mtable
><mtr
><mtd><mn>1</mn> </mtd
><mtd
><mo>tan</mo>
<mo>(</mo>
<mi>a</mi>
<mo>)</mo> </mtd
><mtd><mn>0</mn> </mtd><mtd><mn>0</mn> </mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>1</mn> </mtd
><mtd><mn>0</mn> </mtd><mtd><mn>0</mn> </mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>0</mn> </mtd
><mtd><mn>1</mn> </mtd><mtd><mn>0</mn> </mtd></mtr
><mtr
><mtd><mn>0</mn> </mtd><mtd><mn>0</mn> </mtd
><mtd><mn>0</mn> </mtd><mtd><mn>1</mn></mtd></mtr
></mtable
><mo>)</mo></mrow
></math
>
</td>
</tr>
<tr>
<td><code>[1 0 tan(a) 1 0 0]</code></td>
</tr>
</tbody>
</table>
## Examples
### HTML
```html
<div>Normal</div>
<div class="skewed">Skewed</div>
```
### CSS
```css
div {
width: 80px;
height: 80px;
background-color: skyblue;
}
.skewed {
transform: skewX(10deg); /* Equal to skew(10deg) */
background-color: pink;
}
```
### Result
{{EmbedLiveSample("Examples", 200, 200)}}
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- {{cssxref("transform")}}
- {{cssxref("<transform-function>")}}
- Individual transform properties:
- {{cssxref("translate")}}
- {{cssxref("scale")}}
- {{cssxref("rotate")}}
- Note: there is no `skew` property