Definition
CSS Typed OM Level 1 defines CSSUnparsedValue
[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
interface CSSUnparsedValue : CSSStyleValue {
constructor(sequence<CSSUnparsedSegment> members);
iterable<CSSUnparsedSegment>;
readonly attribute unsigned long length;
getter CSSUnparsedSegment (unsigned long index);
setter CSSUnparsedSegment (unsigned long index, CSSUnparsedSegment val);
};