# CSS - scaleX()

The `scaleX()` CSS function modifies the abscissa of each element point by a constant factor, except if this scale factor is `1`, in which case the function is the identity transform. The scaling is not isotropic and the angles of the element are not conserved.

## Examples

### Without changing the origin

#### HTML

HTML
```<p>foo</p>
<p class="transformed">bar</p>```

#### CSS

CSS
```p {
width: 50px;
height: 50px;
background-color: teal;
}

.transformed {
transform: scaleX(2);
background-color: blue;
}```

### Translating the origin of the transformation

#### HTML

HTML
```<p>foo</p>
<p class="transformed">bar</p>```

#### CSS

CSS
```p {
width: 50px;
height: 50px;
background-color: teal;
}

.transformed {
transform: scaleX(2);
transform-origin: left;
background-color: blue;
}```

## Syntax

CSS
`scaleX(s)`

## Description

The `scaleX()` CSS function modifies the abscissa of each element point by a constant factor, except if this scale factor is `1`, in which case the function is the identity transform. The scaling is not isotropic and the angles of the element are not conserved. `scaleX(sx)` is a shorthand for `scale(sx, 1)` or for `scale3d(sx, 1, 1)`.

`scaleX(-1)` defines an axial symmetry with a vertical axis passing by the origin (as specified by the `transform-origin` property).

s
Is a `<number>` representing the scaling factor to apply on the abscissa of each point of the element.
Cartesian coordinates on ℝ2 Homogeneous coordinates on ℝℙ2 Cartesian coordinates on ℝ3 Homogeneous coordinates on ℝℙ3
$\left(\begin{array}{cc}s& 0\\ 0& 1\end{array}\right)$ $\left(\begin{array}{cc}s0& 0\\ 01& 0\\ 0& 0& 1\end{array}\right)$ $\left(\begin{array}{cc}s0& 0\\ 01& 0\\ 0& 0& 1\end{array}\right)$ $\left(\begin{array}{ccc}s0& 0& 0\\ 01& 0& 0\\ 0& 0& 1& 0\\ 0& 0& 0& 1\end{array}\right)$
`[s 0 0 1 0 0]`