# cast.[framework](https://developers.google.com/cast/docs/reference/web_sender/cast.framework).MediaSessionEventData

class static

Media session changed event data.

## Constructor

### MediaSessionEventData

new
MediaSessionEventData(mediaSession)

| #### Parameter ||
|---|---|
| mediaSession | [chrome.cast.media.Media](https://developers.google.com/cast/docs/reference/web_sender/chrome.cast.media.Media) Media session. Value must not be null. |

## Property

### mediaSession

non-null [chrome.cast.media.Media](https://developers.google.com/cast/docs/reference/web_sender/chrome.cast.media.Media)

Media session.