HTML and CSS Reference
In-Depth Information
Multiple Text Tracks
In addition to support for multiple video and audio tracks, HTML5 also provides support for
multiple text tracks, as well. The text tracks are accessed through an array of
TextTrack
ob-
jects via HTMLMediaElement's
textTracks
property.
The TextTrack interface has no methods but does have several properties:
activeCues
A live
TextTrackCueList
object representing the text track list of cues for the
TextTrack
objects that are flagged as active.
cues
A live
TextTrackCueList
object representing the text track list of cues. The cues provide
information to the user agent for rendering.
kind
The kind of text track object.
language
The text track language of the text track.
readyState
The ready state for the text track.
mode
Whether the text track is on or off, and whether hidden or not.
The
kind
and
language
attributes will be discussed in more detail in the next section, cover-
ing the
track
element. The
readyState
property can be one of four constant values:
NONE (0)
NONE (0)
The text track is not loaded.
LOADING (1)
The text track is loading.
LOADED (2)
LOADED (2)
The text track is loaded.
