From 3603e87567a797b34c4fb41ec3a655a84fdbef9f Mon Sep 17 00:00:00 2001
From: Shivam Gupta <231542@kit.ac.in>
Date: Mon, 15 Jun 2026 11:01:27 +0530
Subject: [PATCH 1/2] fix: pause leaderboard polling when tab is hidden using
 Page Visibility API

---
 frontend/leaderboard.html | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/frontend/leaderboard.html b/frontend/leaderboard.html
index 932e40f6..7e11f5f9 100644
--- a/frontend/leaderboard.html
+++ b/frontend/leaderboard.html
@@ -187,7 +187,27 @@ <h1 class="page-title">Leaderboard</h1>
         setupPaginationListeners();
         fetchLeaderboardData();
         // Poll every 2 minutes to detect new syncs
-        setInterval(fetchLeaderboardData, 2 * 60 * 1000);
+       // Page Visibility API — pause polling when tab is hidden
+let pollInterval;
+
+function startPolling() {
+  pollInterval = setInterval(fetchLeaderboardData, 2 * 60 * 1000);
+}
+
+function stopPolling() {
+  clearInterval(pollInterval);
+}
+
+document.addEventListener('visibilitychange', () => {
+  if (document.visibilityState === 'visible') {
+    fetchLeaderboardData(); // immediate refresh when tab becomes visible
+    startPolling();
+  } else {
+    stopPolling();
+  }
+});
+
+startPolling(); 
       });
 
       const leaderboardData = {};

From 9a135f34fca77d10c61b014ddeff46c0905a6c77 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Mon, 15 Jun 2026 15:08:03 +0000
Subject: [PATCH 2/2] style: auto-format code with Prettier (/format)

---
 frontend/leaderboard.html | 42 +++++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/frontend/leaderboard.html b/frontend/leaderboard.html
index 7e11f5f9..977b9ca7 100644
--- a/frontend/leaderboard.html
+++ b/frontend/leaderboard.html
@@ -187,27 +187,27 @@ <h1 class="page-title">Leaderboard</h1>
         setupPaginationListeners();
         fetchLeaderboardData();
         // Poll every 2 minutes to detect new syncs
-       // Page Visibility API — pause polling when tab is hidden
-let pollInterval;
-
-function startPolling() {
-  pollInterval = setInterval(fetchLeaderboardData, 2 * 60 * 1000);
-}
-
-function stopPolling() {
-  clearInterval(pollInterval);
-}
-
-document.addEventListener('visibilitychange', () => {
-  if (document.visibilityState === 'visible') {
-    fetchLeaderboardData(); // immediate refresh when tab becomes visible
-    startPolling();
-  } else {
-    stopPolling();
-  }
-});
-
-startPolling(); 
+        // Page Visibility API — pause polling when tab is hidden
+        let pollInterval;
+
+        function startPolling() {
+          pollInterval = setInterval(fetchLeaderboardData, 2 * 60 * 1000);
+        }
+
+        function stopPolling() {
+          clearInterval(pollInterval);
+        }
+
+        document.addEventListener("visibilitychange", () => {
+          if (document.visibilityState === "visible") {
+            fetchLeaderboardData(); // immediate refresh when tab becomes visible
+            startPolling();
+          } else {
+            stopPolling();
+          }
+        });
+
+        startPolling();
       });
 
       const leaderboardData = {};