When the close() method is called on a PresentationConnection, the user agent begins the process of closing the connection by sending an empty closeMessage with the closeReason set to closed.
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/PresentationConnection/close