> CLOSING (numeric value 2)
> The connection is going through the closing handshake.

The readyState can enter CLOSING also when close() is called before establishment. In that case, it's not going through closing handshake.

> When the user agent validates the server's response during the "establish a WebSocket connection" algorithm, if the status code received from the server is not 101 (e.g. it is a redirect), the user agent must fail the websocket connection.

websocket -> WebSocket

> If the user agent was required to fail the websocket connection or the WebSocket connection is closed with prejudice, fire a simple event named error at the WebSocket object. [WSP]

websocket -> WebSocket

> interface CloseEvent : Event {
>   readonly attribute boolean wasClean;
>   readonly attribute unsigned short code;
>   readonly attribute DOMString reason;
> };

missing anchor on reason to its description