The HTMLTableCaptionElement interface special properties (beyond the regular HTMLElement interface it also has available to it by inheritance) for manipulating table caption elements.
The HTMLTableColElement interface provides special properties (beyond the HTMLElement interface it also has available to it inheritance) for manipulating single or grouped table column elements.
The HTMLElement interface represents any HTML element. Some elements directly implement this interface, others implement it via an interface that inherits it.
The <keygen> elements expose the HTMLKeygenElement interface, which provides special properties and methods (beyond the regular element object interface they also have available to them by inheritance) for manipulating the layout and presentation of keygen elements.
The HTMLMediaElement interface adds to HTMLElement the properties and methods needed to support basic media-related capabilities that are common to audio and video. The HTMLVideoElement and HTMLAudioElement elements both inherit this interface.
The HTML <meter> elements expose the HTMLMeterElement interface, which provides special properties and methods (beyond the HTMLElement object interface they also have available to them by inheritance) for manipulating the layout and presentation of <meter> elements.
The HTMLOptGroupElement interface provides special properties and methods (beyond the regular HTMLElement object interface they also have available to them by inheritance) for manipulating the layout and presentation of <optgroup> elements.
The HTMLOutputElement interface provides properties and methods (beyond those inherited from HTMLElement) for manipulating the layout and presentation of <output> elements.