Invalid <track kind> values behave like "metadata", not "subtitles"

Invalid values for <track kind> are currently treated as "subtitles". This means that any new values will be treated as subtitles by old UAs. Instead use "metadata" as the "invalid value default", to avoid UAs showing <track>s with unrecognized values.



Established standard

Status in Chromium


Enabled by default (launch bug) in:

  • Chrome for desktop release 52
  • Chrome for Android release 52
  • Android WebView release 52
  • Opera release 39
  • Opera for Android release 39

Consensus & Standardization

  • Shipped
  • No public signals
  • No public signals
  • No signals


Last updated on 2017-06-14