The SVGRect represents a rectangle. Rectangles consist of <code>x</code> and <code>y</code> coordinate pair identifying a minimum X value, a minimum Y value, and a width and height, which are constrained to be non-negative.
SVGTransform is the interface for one of the component transformations within an SVGTransformList; thus, an SVGTransform object corresponds to a single component (e.g., scale(…) or matrix(…)) within a transform attribute.
The WorkerGlobalScope interface of the Web Workers API is an interface representing the scope of any worker. Workers have no browsing context; this scope contains the information usually conveyed by Window objects — in this case event handlers, the console or the associated WorkerNavigator object. Each WorkerGlobalScope has its own event loop.