/*Show a label and grey overlay or hide both on connection change. */
var g_StatusMessageTypes = {
"authenticated": msg => translate("Connection to the server has been authenticated."),
"connected": msg => translate("Connected to the server."),
"disconnected": msg => translate("Connection to the server has been lost.") + "\n" +
// Translation: States the reason why the client disconnected from the server.
sprintf(translate("Reason: %(reason)s."), { "reason": getDisconnectReason(msg.reason) }) + "\n" +
translate("The game has ended."),
"waiting_for_players": msg => translate("Waiting for other players to connect..."),
"join_syncing": msg => translate("Synchronising gameplay with other players..."),
"active": msg => ""
};
As code above, what "=>" means? Someone help me?