Definition
Scalable Vector Graphics (SVG) 2 defines SVGViewElement
[Exposed=Window]
interface SVGViewElement : SVGElement {};
SVGViewElement includes SVGFitToViewBox;
Consolidated IDL (across mixin and partials)
[Exposed=Window]
interface SVGViewElement : SVGElement {
[SameObject] readonly attribute SVGAnimatedRect viewBox;
[SameObject] readonly attribute SVGAnimatedPreserveAspectRatio preserveAspectRatio;};