From c3e861d78c175579474352c9706b49e379a9a7db Mon Sep 17 00:00:00 2001
From: LeeLenaleee <39033624+LeeLenaleee@users.noreply.github.com>
Date: Sun, 8 Nov 2020 21:41:52 +0100
Subject: [PATCH] dataset tooltip now shows correctly (#8024)

* dataset tooltip now shows correctly

* removed optional chaining
---
 src/plugins/plugin.tooltip.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/plugins/plugin.tooltip.js b/src/plugins/plugin.tooltip.js
index c4fbb38c8..7a33d3967 100644
--- a/src/plugins/plugin.tooltip.js
+++ b/src/plugins/plugin.tooltip.js
@@ -1146,7 +1146,10 @@ export default {
 					const item = tooltipItems[0];
 					const labels = item.chart.data.labels;
 					const labelCount = labels ? labels.length : 0;
-					if (item.label) {
+
+					if (this && this.options && this.options.mode === 'dataset') {
+						return item.dataset.label || '';
+					} else if (item.label) {
 						return item.label;
 					} else if (labelCount > 0 && item.dataIndex < labelCount) {
 						return labels[item.dataIndex];
@@ -1163,6 +1166,10 @@ export default {
 			// Args are: (tooltipItem, data)
 			beforeLabel: noop,
 			label(tooltipItem) {
+				if (this && this.options && this.options.mode === 'dataset') {
+					return tooltipItem.label + ': ' + tooltipItem.formattedValue || tooltipItem.formattedValue;
+				}
+
 				let label = tooltipItem.dataset.label || '';
 
 				if (label) {
-- 
2.47.2