Definition
HTML Standard defines CanvasRect
interface mixin CanvasRect {
// rects
undefined clearRect(unrestricted double x, unrestricted double y, unrestricted double w, unrestricted double h);
undefined fillRect(unrestricted double x, unrestricted double y, unrestricted double w, unrestricted double h);
undefined strokeRect(unrestricted double x, unrestricted double y, unrestricted double w, unrestricted double h);
};