reflectX
Mirror a path across the Y axis (negate all x coordinates).
reflectX(svgPath: string): string
svgPath — SVG path d-attribute string.
Returns — A new SVG path string mirrored horizontally across x = 0.
// Mirror a shape across the Y axis
const mirrored = pathRite.reflectX("M 10 0 L 50 0 L 50 50 Z");