this.supported is undefined when changing captions

[ThibaultNocchi]

Expected behaviour

There shouldn't be an error in the console when changing tracks

Actual behaviour

This console error is raised:

Uncaught TypeError: this.supported is undefined
    setup https://unpkg.com/plyr@3:1
    set currentTrack https://unpkg.com/plyr@3:1
    createMenuItem https://unpkg.com/plyr@3:1
    lt https://unpkg.com/plyr@3:1
    lt https://unpkg.com/plyr@3:1
    ge https://unpkg.com/plyr@3:1
    ge https://unpkg.com/plyr@3:1
    fe https://unpkg.com/plyr@3:1
    lt https://unpkg.com/plyr@3:1
    createMenuItem https://unpkg.com/plyr@3:1
    setCaptionsMenu https://unpkg.com/plyr@3:1
    update https://unpkg.com/plyr@3:1
    setTimeout handler*setup https://unpkg.com/plyr@3:1
    build https://unpkg.com/plyr@3:1
    wt https://unpkg.com/plyr@3:1
    <anonymous> https://cdpn.io/cp/internal/boomboom/pen.js?key=pen.js-ef204373-eaa0-7eac-0ca1-d47f23a19710:3
plyr@3:1:36562

Steps to reproduce

• Open the console
• Go to the vanilla HTML5 demo link from the README (https://codepen.io/pen?template=bKeqpr)
• Change a caption, either via UI or via JS

Environment

• Browser: FF 93.0 and Chromium 94.0.4606.81
• Operating System: Linux

Console errors (if any)

Given above

Link to where the bug is happening

The basic demo displays it

Thanks in advance, have a nice day!

[tractorcow]

I encountered this issue on 3.6.12, and attempted a slight downgrade. 3.6.8 did not have this issue, if that helps narrow down the search range.

[tractorcow]

Perhaps it could be related to #2261

Maybe this will resolve.

captions.setup.call(this);

[tractorcow]

Fixed with #2399

[sampotts]

Thanks for the teamwork in fixing this. The fix is released in v3.7.0 🎉