These API calls are used to listen to or update the video quality if multiple quality levels of a video are provided. Quality levels are sorted and given index numbers.
| Method | Description |
|---|
| .on('levels') | Fired when the list of available quality levels is updated. Happens e.g. shortly after a playlist item starts playing. |
| .on('levelsChanged') | Fired when the active quality level is changed. Happens in response to e.g. a user clicking an option in the quality menu or a script calling setCurrentQuality. |
| .on('visualQuality') | Fired when the active quality level is changed for HLS. This is different than levelsChanged since this will trigger when adaptive streaming automatically shifts quality. |
