Adds an event handler that runs when playback has ended.
An audio track ends when playback reaches the duration of the audio.
If the audio track is set to play in a loop, this event handler is never triggered.
handler(event: Event): void The name of the function or
the function expression to run when the audio track has ended.
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.