From f191f2f5f9a1e1e1a95f1722b41d168244b1d554 Mon Sep 17 00:00:00 2001
From: LeeLenaleee <39033624+LeeLenaleee@users.noreply.github.com>
Date: Wed, 16 Dec 2020 22:40:10 +0100
Subject: [PATCH] Remove dataset while hovered (#8181)

---
 src/core/core.controller.js | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/core/core.controller.js b/src/core/core.controller.js
index b4d200d4bfe..80632579d80 100644
--- a/src/core/core.controller.js
+++ b/src/core/core.controller.js
@@ -725,7 +725,7 @@ class Chart {
 				hidden: null,			// See isDatasetVisible() comment
 				xAxisID: null,
 				yAxisID: null,
-				order: dataset.order || 0,
+				order: dataset && dataset.order || 0,
 				index: datasetIndex,
 				_dataset: dataset,
 				_parsed: [],
@@ -808,7 +808,7 @@ class Chart {
 		const me = this;
 		const meta = me._metasets && me._metasets[datasetIndex];
 
-		if (meta) {
+		if (meta && meta.controller) {
 			meta.controller._destroy();
 			delete me._metasets[datasetIndex];
 		}
@@ -933,8 +933,9 @@ class Chart {
 
 		for (i = 0, ilen = items.length; i < ilen; ++i) {
 			item = items[i];
-			if (item) {
-				this.getDatasetMeta(item.datasetIndex).controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);
+			const controller = item && this.getDatasetMeta(item.datasetIndex).controller;
+			if (controller) {
+				controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);
 			}
 		}
 	}