From 58a898dfe0631e70e9fcac988c5e207e9bd76346 Mon Sep 17 00:00:00 2001
From: Yuriha <121590760+yuriha-chan@users.noreply.github.com>
Date: Mon, 26 Jun 2023 10:45:14 +0900
Subject: [PATCH] Fix offscreencanvas undefined (#11017)

* Suppress ReferenceError on some environments (i.e. older iOS)

* fix

* fix

* lint

* adopt suggestion by acid-chicken
---
 packages/frontend/src/workers/test-webgl2.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/frontend/src/workers/test-webgl2.ts b/packages/frontend/src/workers/test-webgl2.ts
index 4769524d9c..8f13c57cae 100644
--- a/packages/frontend/src/workers/test-webgl2.ts
+++ b/packages/frontend/src/workers/test-webgl2.ts
@@ -1,5 +1,5 @@
-const canvas = new OffscreenCanvas(1, 1);
-const gl = canvas.getContext('webgl2');
+const canvas = globalThis.OffscreenCanvas && new OffscreenCanvas(1, 1);
+const gl = canvas?.getContext('webgl2');
 if (gl) {
     postMessage({ result: true });
 } else {