An SVGPoint represents a 2D or 3D point in the SVG coordinate system.
Returns the orientation in degrees (in 90-degree increments) of the viewport relative to the device's natural orientation.
The Element.accessKey property sets the keystroke by which a user can press to jump to this element.
The StyleSheetList interface represents a list of StyleSheet.
Microformats (sometimes abbreviated μF) are simple conventions used to embed semantics in HTML and quickly provide an API to be used by search engines, aggregators, and other tools. These small patterns of HTML are used for marking entities that range from fundamental to domain-specific information, such as people, organizations, events, and locations. 
The word-break CSS property is used to specify whether to break lines within words.
The EncryptedMediaExtenstions API provides interfaces for controlling the playback of content which is subject to a digital restrictions management scheme.
It's easy to get confused about which target to examine when writing an event handler. This article should clarify the use of the target properties.
The @viewport CSS at-rule contains a set of nested descriptors in a CSS block that is delimited by curly braces. These descriptors control viewport settings, primarily on mobile devices.
-moz-force-broken-image-icon is an extended CSS property. The value 1 forces a broken image icon even if the image has an alt attribute. When the value 0 is used the image will act as usual and only display the alt attribute.
The CSS Font Loading API provides events and interfaces for dynamically loading font resources.
The documentURI property of the Document interface returns the document location as a string.
Returns a DOMImplementation object associated with the current document.