Add VTTCue and WEBVtt support

Site Outreach Issue #14623778

Details

Author
Oren M.
Created
Nov 11, 2017
Privacy
This issue is public.
Found in
  • Microsoft Edge
  • Internet Explorer
Reports
Reported by 1 person

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Steps to reproduce

WebVTT: https://developer.mozilla.org/en-US/docs/Web/API/WebVTT_API
VTTCue: https://w3c.github.io/webvtt/#the-vttcue-interface

Supported by all other browser vendors in Chrome, FF, Safari.
Also implement ::CUE pseudo-element to enable support in CVAA.

Currently all player developers need to create their own subtitles/captions implementations due to browser having fragmented support in all of the above which makes supporting accessibility very hard and cumbersome.
Having you support this will ensure better interoperability.
Please consider migrating the solution to IE11 as well as you still have it on platforms which are widely supported and EOL is not near as it seems.

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