TextTrack - Web APIs
texttrack.activecues read only a texttrackcuelist object listing the currently active set of text track cues.
... texttrack.cues read only a texttrackcuelist which contains all of the track's cues.

The HTML DOM API - Web APIs
audiotrack audiotracklist mediaerror texttrack texttrackcue texttrackcuelist texttracklist timeranges trackevent videotrack videotracklist drag and drop interfaces these interfaces are used by the html_drag_and_drop_api to represent individual draggable (or dragged) items, groups of dragged or draggable items, and to handle the drag and drop process.