Emitted when a subtitle cue transitions into the active status.
The Cue representing the cue.
The end time of the cue. See Cue.end.
The html of the cue. See Cue.html.
The image of the cue. See Cue.image.
The start time of the cue. See Cue.start.
The text of the cue. See Cue.text.