graphs: set x-axis using absolute time in advance()

setInterval() won't be reliably fired by the browser when the tab is backgrounded!
2025-10-15 22:43:04 +02:00
parent 0502779a29
commit 0c7e810bd3
1 changed files with 4 additions and 2 deletions
@@ -200,8 +200,10 @@ function pruneGraphData(dataset, options) {
 }

 function advance() {
-  graph.options.scales.x.min += LIVE_REFRESH_INTERVAL_MSECS;
-  graph.options.scales.x.max += LIVE_REFRESH_INTERVAL_MSECS;
+  // advance is called in a timer and when the browser tab is in the background , it is unreliable. Use absolute time to set the scale
+  const now = Date.now();
+  graph.options.scales.x.min = now - 5*60*1000;
+  graph.options.scales.x.max = now;
  graph.update('none');
 }