From d3fa95fa4bb1ea370721e093548624fc619c5976 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niilo=20Kein=C3=A4nen?= <niilo.keinanen@lightningchart.com>
Date: Tue, 10 Jan 2023 08:47:34 +0200
Subject: [PATCH] Return null when gl context not available

---
 src/index.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/index.ts b/src/index.ts
index 5603559..a41afb9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -33,6 +33,9 @@ dom.window.HTMLCanvasElement.prototype.getContext = function () {
     if (arguments[0] === 'webgl') {
         // create headless-gl GL context
         const ctx: ReturnType<typeof createContext> & Partial<StackGlResize> = createContext(1, 1, arguments[1])
+        if (!ctx) {
+            return ctx
+        }
         // insert the resize method to the context so that lcjs package can use it
         ctx.resize = ctx.getExtension('STACKGL_resize_drawingbuffer').resize
         return ctx