Fix: () => { } -> function() { }

src/game/result/history_board.js

@@ -25,7 +25,7 @@ class HistoryBoard {
 		this.dbConnectManager.requestPlayerHistory(
 			sessionStorageManager.maestroID,
 			date,
-			historyRecordManager => {
+			(function(historyRecordManager) {
 				if(historyRecordManager.count == 0) {
 					console.log("history board - no data");
 					return;
@@ -38,7 +38,7 @@ class HistoryBoard {
 					if(date == data.date)
 						this.todayBestRecord = data.bestRecord;
 				}
-			}
+			})
 		);
 	}