diff --git a/src/components/state-history-charts.html b/src/components/state-history-charts.html index 04cf753fb1..f827adef88 100644 --- a/src/components/state-history-charts.html +++ b/src/components/state-history-charts.html @@ -116,8 +116,8 @@ class StateHistoryCharts extends Polymer.Element { } _computeIsEmpty(historyData) { - return (historyData && - historyData.timeline.length === 0 && + return !historyData || !historyData.timeline || !historyData.line || + (historyData.timeline.length === 0 && historyData.line.length === 0); }