interface Deno.WebSocketUpgrade The object that is returned from a [`Deno.upgradeWebSocket`](../././~/Deno.upgradeWebSocket) request. Properties response: Response The response object that represents the HTTP response to the client, which should be used to the `RequestEvent` `.respondWith()` for the upgrade to be successful. socket: WebSocket The `WebSocket` interface to communicate to the client via a web socket.