From: Evert Timberg <evert.timberg+github@gmail.com>
Date: Tue, 28 Apr 2020 01:53:53 +0000 (-0400)
Subject: Check for destroyed charts when handling throttled DOM events (#7293)
X-Git-Tag: v3.0.0-beta.2~164
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f19a701bc5c8c6da117871734e641bd8038fad07;p=thirdparty%2FChart.js.git

Check for destroyed charts when handling throttled DOM events (#7293)

Co-authored-by: Evert Timberg <etimberg@opusonesolutions.com>
---

diff --git a/src/platform/platform.dom.js b/src/platform/platform.dom.js
index e721c0c2c..ee5aafa80 100644
--- a/src/platform/platform.dom.js
+++ b/src/platform/platform.dom.js
@@ -386,7 +386,12 @@ export default class DomPlatform extends BasePlatform {
 		}
 
 		const proxy = proxies[type] = throttled((event) => {
-			listener(fromNativeEvent(event, chart));
+			// This case can occur if the chart is destroyed while waiting
+			// for the throttled function to occur. We prevent crashes by checking
+			// for a destroyed chart
+			if (chart.ctx !== null) {
+				listener(fromNativeEvent(event, chart));
+			}
 		}, chart);
 
 		addListener(canvas, type, proxy);