classList (DOMTokenList)

Method of easily manipulating classes on elements, using the `DOMTokenList` object.

Basic console logging functions

Method of outputting data to the browser's console, intended for development purposes.

Ogg Vorbis audio format

Vorbis is a free and open source audio format, most commonly used with the Ogg container.

Ogg/Theora video format

Free lossy video compression format.

Proxy object

The Proxy object allows custom behavior to be defined for fundamental operations. Useful for logging, profiling, object visualization, etc.

CSS3 3D Transforms

Method of transforming an element in the third dimension using the `transform` property. Includes support for the `perspective` property to set the perspective in z-space and the `backface-visibility` property to toggle display of the reverse side of a 3D-transformed element.

domtokenlist api: toggle

domtokenlist api: toggle: `force` parameter

element api: toggleattribute

htmlelement api: `beforetoggle` event

htmlelement api: `beforetoggle` event: `beforetoggle` event fires at dialog elements

htmlelement api: `beforetoggle` event: `beforetoggle` event fires at popover elements

htmlelement api: togglepopover

htmlelement api: togglepopover: returns `true` or `false`

htmlelement api: togglepopover: `source` option

htmlelement api: togglepopover: `source` option: implicit anchor reference via `source`

htmlelement api: `toggle` event

htmlelement api: `toggle` event: `toggle` event fires at details elements

htmlelement api: `toggle` event: `toggle` event fires at dialog elements

htmlelement api: `toggle` event: `toggle` event fires at popover elements

mediasession api: `setactionhandler()`: `"togglecamera"` type

mediasession api: `setactionhandler()`: `"togglemicrophone"` type

toggleevent api

toggleevent api: newstate

toggleevent api: oldstate

toggleevent api: `toggleevent()` constructor

headers http header: `service-worker` request header for logging service worker script resource requests.