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Fix possible JS error (#789)

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Andrey 2018-01-08 00:13:49 +02:00 committed by Paulus Schoutsen
parent 7231976af6
commit c06be58a33
1 changed files with 2 additions and 2 deletions
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4
src/components/state-history-charts.html
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@ -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);
}