From aaf62576c1c75c0eb657891e6bf45d3f84036ccd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=BE=E3=81=A3=E3=81=A1=E3=82=83=E3=81=A8=E3=83=BC?=
 =?UTF-8?q?=E3=81=AB=E3=82=85?=
 <17376330+u1-liquid@users.noreply.github.com>
Date: Tue, 19 Sep 2023 12:50:47 +0900
Subject: [PATCH] Fix OffscreenCanvas undefined (MisskeyIO#165)

---
 packages/frontend/src/workers/test-webgl2.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/frontend/src/workers/test-webgl2.ts b/packages/frontend/src/workers/test-webgl2.ts
index b3501cfe50..1f3f640e6b 100644
--- a/packages/frontend/src/workers/test-webgl2.ts
+++ b/packages/frontend/src/workers/test-webgl2.ts
@@ -3,8 +3,10 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-const canvas = globalThis.OffscreenCanvas && new OffscreenCanvas(1, 1);
-const gl = canvas.getContext('webgl2');
+const canvas = typeof OffscreenCanvas !== 'undefined'
+	? new OffscreenCanvas(1, 1)
+	: undefined;
+const gl = canvas?.getContext('webgl2');
 if (gl) {
 	postMessage({ result: true });
 } else {