Each transform action appends to the selected elements' `transform` attribute. Has no effect on elements that don't accept `transform` as part of their [content-model](https://www.w3.org/TR/2011/REC-SVG11-20110816/attindex.html). Overwrites transforms with an `"inherit"` value. Applies transforms in SVG 1.1 format, including units.
The skew-x action accepts an angle (in degrees) as a floating-point number.
```sh
-skewX angle
```