textTracks.onchange event is not firing

External Issue #8019792


Jun 28, 2016
This issue is public.
Found in
  • Microsoft Edge
Reported by 4 people

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Steps to reproduce


This page has an event listener for textTracks.onchange. An alert should appear when this event is triggered.

1 - Begin video playback
2 - Change Closed captions

Expected behavior:
An alert should appear, displaying that the track has been changed.

Actual behavior:
No alert appears in Edge. (But does in Safari and Chrome)

This is needed by our video player to control the display of captions via our own control bar. It also appears to affect VTT captions and 608 embedded captions in HLS streams.


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Ibrahim O.”

      Changed Assigned To to “Venkat K.”

      Changed Assigned To from “Venkat K.” to “Frank L.”

    • I can confirm the bug in Edge 14.14382. In Firefox (Dev Edition 49), there’s no CC button for some reason, but it does work as intended in Chrome.

    • I can confirm this bug me too, Firefox + Chrome raises the textTracks.onchange when clicking on cc button, and unfortunately not Edge.

    • Microsoft Edge Team

      Changed Status to “External”

    • This issue has been resolved External. This means this issue may require a new feature to be implemented or other work that is more significant than a typical bug. You may be able to find more information on this issue by searching for related features on status.microsoftedge.com and uservoice.microsoftedge.com.

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