language read-only property of the
TextTrack interface returns the language of the text track.
This uses the same values as the HTML
lang attribute. These values are documented in RFC 5646: Tags for Identifying Languages (also known as BCP 47).
A string containing a language identifier. For example,
"en-US" for United States English or
"pt-BR" for Brazilian Portuguese.
In the following example the value of
language is printed to the console.
let video = document.querySelector("video"); let track = video.addTextTrack("captions", "Captions", "en-US"); track.mode = "showing"; console.log(track.language);
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