Web Video Text Tracks Format (WebVTT) - Web APIs
region; attribute directionsetting vertical; attribute boolean snaptolines; attribute (double or autokeyword) line; attribute linealignsetting linealign; attribute (double or autokeyword) position; attribute positionalignsetting positionalign; attribute double size; attribute alignsetting align; attribute domstring text; documentfragment getcueashtml(); }; vtt region interface this is the second interface in webvtt api.
...we can categorize them for better understanding relating to each interface in webvtt: vttcue the methods which are available in this interface are: getcueashtml to get the html of that cue.

VTTCue - Web APIs
methods getcueashtml() returns the cue text as a documentfragment.