A MediaQueryList object maintains a list of media queries on a document, and handles sending notifications to listeners when the media queries on the document change.
The Node.namespaceURI read-only property returns the namespace URI of the node, or null if the node is not in a namespace. When the node is a document, it returns the XML namespace for the current document.
Returns an interface to register or unregister a push registration, get an active registration, or check the permission status of the registration. This interface has been superceded by PushManager.
TheSVGCircleElement interface is an interface for the <circle> element. The circle element is defined by the cx and cy attributes, that denote the coordinates of the centre of the circle. It also has a radius attribute r that denotes the radius of the circle. The radius value must be positive to allow the successful rendering of the element.