Bug 195046 – Video text track changed VIA javascript are not reflected in native iOS text/audio UI

• Status: NEW
• Component: Media

[Oren Me]

Created attachment 362982 [details]
Incorrect UI when changing text tracks VIA javascript

1. Load any HLS with text track
2. Start playback
3. Set active text track via javascript, i.e. video.textTracks[0].mode = "showing"
4. Open native text/audio menu

Expected:
The UI should show that the first text track is set as active

Actual:
The UI is not updated and shows the incorrect text option


The native UI just doesn't update correctly, this is especially a pain point in iOS where players that are playing in inline playback have their own UI, and when user goes to fullscreen the UI is of the iOS system and doing changes in either native or HTML5 rendered UI is not reflected between them.
The issue is more than just the above repro steps, it happens in more use cases and just causes a lot of issues.

[Radar WebKit Bug Importer]

<rdar://problem/48405879>

[Oren Me]

Hi, were you able to check the issue?

[Jer Noble]

Not yet, no. We’ll update this bug when we do.