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.

Documentation

• https://developer.mozilla.org/en-US/docs/Web/HTML/Element/track

Specification

Established standard

Status in Chromium

Blink components: Blink

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

• Firefox: Shipped
• Edge: No public signals
• Safari: No public signals
• Web Developers: No signals

Owner

• fs@opera.com

Last updated on 2017-06-14