Error with cue-points in Edge and IE11

[GreyingRaven]

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Description

First of all, great work. this is an amazing app. Cue-Points don't work in MS browsers, they show but it gives errors when adding or removing

Currently using

• Angular 5.0.2
• [email protected]
• Microsoft Edge 40.15063.674.0
• Microsoft EdgeHTML 15.15063
• IExplorer: 11.647.15063.0
• IExplorer Update Version: 11.0.47 (KB4040685)

Expected Behavior

It should work as in other browsers, allowing addition and removal of cue-points

Actual Behavior

When you try to remove a cue-point it gives the following error: ERROR Error: Unexpected call to method or property access.

When you try to add a cue-point it gives the following error: ERROR ReferenceError: 'VTTCue' is undefined

Steps to Reproduce

To reproduce this behavior open the showroom with iExplorer or Edge

1. Try to add a new cue
2. Try to remove an existing cue

[sliceofbytes]

The following polyfill will fix the issue for the time being.

window['VTTCue'] = window['VTTCue'] || window['TextTrackCue'];