From 6c67b2e40e56d3e32cb4a4e64e3e34ccddd0af63 Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Fri, 2 Feb 2024 18:15:25 +0900
Subject: [PATCH] =?UTF-8?q?fix(frontend):=20=E3=83=81=E3=83=A3=E3=83=BC?=
 =?UTF-8?q?=E3=83=88=E3=81=AElegend=E3=81=8C=E3=82=AF=E3=83=AA=E3=83=83?=
 =?UTF-8?q?=E3=82=AF=E3=81=AB=E5=8F=8D=E5=BF=9C=E3=81=97=E3=81=AA=E3=81=84?=
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これにより発生 https://github.com/misskey-dev/misskey/pull/12926
---
 packages/frontend/src/components/MkChartLegend.vue | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/frontend/src/components/MkChartLegend.vue b/packages/frontend/src/components/MkChartLegend.vue
index 110eeca5db..d2b06675ba 100644
--- a/packages/frontend/src/components/MkChartLegend.vue
+++ b/packages/frontend/src/components/MkChartLegend.vue
@@ -30,9 +30,9 @@ function onClick(item: LegendItem) {
 	if (chart.value == null) return;
 	if (type.value === 'pie' || type.value === 'doughnut') {
 		// Pie and doughnut charts only have a single dataset and visibility is per item
-		if (item.index) chart.value.toggleDataVisibility(item.index);
+		if (item.index != null) chart.value.toggleDataVisibility(item.index);
 	} else {
-		if (item.datasetIndex) chart.value.setDatasetVisibility(item.datasetIndex, !chart.value.isDatasetVisible(item.datasetIndex));
+		if (item.datasetIndex != null) chart.value.setDatasetVisibility(item.datasetIndex, !chart.value.isDatasetVisible(item.datasetIndex));
 	}
 	chart.value.update();
 }