From 6666cbd5d504149531719bd1fed24a848fafce2e Mon Sep 17 00:00:00 2001
From: Arun Philip <dacodedbeat@gmail.com>
Date: Tue, 7 May 2024 18:04:05 -0400
Subject: [PATCH] do not attempt to clear canvas if one does not exist

---
 src/helpers/helpers.canvas.ts      |  6 +++++-
 test/specs/helpers.canvas.tests.js | 10 ++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/helpers/helpers.canvas.ts b/src/helpers/helpers.canvas.ts
index a959d1dea1d..f37504c0097 100644
--- a/src/helpers/helpers.canvas.ts
+++ b/src/helpers/helpers.canvas.ts
@@ -131,7 +131,11 @@ export function _alignPixel(chart: Chart, pixel: number, width: number) {
 /**
  * Clears the entire canvas.
  */
-export function clearCanvas(canvas: HTMLCanvasElement, ctx?: CanvasRenderingContext2D) {
+export function clearCanvas(canvas?: HTMLCanvasElement, ctx?: CanvasRenderingContext2D) {
+  if (!ctx && !canvas) {
+    return;
+  }
+
   ctx = ctx || canvas.getContext('2d');
 
   ctx.save();
diff --git a/test/specs/helpers.canvas.tests.js b/test/specs/helpers.canvas.tests.js
index ec7a539042a..60f1b1f8700 100644
--- a/test/specs/helpers.canvas.tests.js
+++ b/test/specs/helpers.canvas.tests.js
@@ -21,6 +21,16 @@ describe('Chart.helpers.canvas', function() {
       expect(chart.ctx.clearRect.calls.first().object).toBe(chart.ctx);
       expect(chart.ctx.clearRect.calls.first().args).toEqual([0, 0, 150, 245]);
     });
+
+    it('should not throw error when chart is null', function() {
+      function createChart() {
+        return acquireChart({}, {
+          canvas: null
+        });
+      }
+
+      expect(createChart).not.toThrow();
+    });
   });
 
   describe('isPointInArea', function() {