The CSSSkewX interface of the CSS Typed Object Model API represents the skewX() value of the individual transform property in CSS.
CSSSkewX
skewX()
MDN Reference
The ax property of the along the x-axis (or abscissa).
ax
The is2D read-only property of the CSSTransformComponent interface indicates where the transform is 2D or 3D.
is2D
The toMatrix() method of the object.
toMatrix()