CSSPerspective.toMatrix() should throw a TypeError if its length is not compatible with 'px' unit: - https://drafts.css-houdini.org/css-typed-om-1/#dom-csstransformcomponent-tomatrix
Pull request: https://github.com/WebKit/WebKit/pull/5659
Committed 255876@main (02ba20dc48a2): <https://commits.webkit.org/255876@main> Reviewed commits have been landed. Closing PR #5659 and removing active labels.
<rdar://problem/101461785>