From 3ca35ce91d6b9c22832baeb7e50962451c2ede08 Mon Sep 17 00:00:00 2001
From: Dan Cojocaru <dancojocaru2010@hotmail.com>
Date: Tue, 20 Sep 2022 00:34:49 +0300
Subject: [PATCH] Prevent refresh on back to group select

If train data is already known, don't refresh when going back to the group
selection screen.
---
 view-train.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/view-train.js b/view-train.js
index 28fcd32..825577a 100755
--- a/view-train.js
+++ b/view-train.js
@@ -343,7 +343,12 @@ function rsk() {
 
 window.addEventListener('popstate', function (e) {
 	groupIndex = null
-	refresh()
+	if (trainData) {
+		onTrainData(trainData)
+	}
+	else {
+		refresh()
+	}
 })
 
 window.addEventListener('load', function (e) {