From 6cb7e007e2da56f52ea36acaa19c73a187de4864 Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Fri, 20 May 2022 16:51:56 +0900
Subject: [PATCH] WebGLRenderer: Listen to webglcontextcreationerror event.

---
 src/renderers/WebGLRenderer.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index 696d68a47266f4..4669da78fc01d5 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -252,6 +252,7 @@ function WebGLRenderer( parameters = {} ) {
 		// event listeners must be registered before WebGL context is created, see #12753
 		_canvas.addEventListener( 'webglcontextlost', onContextLost, false );
 		_canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );
+		_canvas.addEventListener( 'webglcontextcreationerror', onContextCreationError, false );
 
 		if ( _gl === null ) {
 
@@ -593,6 +594,7 @@ function WebGLRenderer( parameters = {} ) {
 
 		_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );
 		_canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );
+		_canvas.removeEventListener( 'webglcontextcreationerror', onContextCreationError, false );
 
 		renderLists.dispose();
 		renderStates.dispose();
@@ -653,6 +655,12 @@ function WebGLRenderer( parameters = {} ) {
 
 	}
 
+	function onContextCreationError( event ) {
+
+		console.error( 'THREE.WebGLRenderer: A WebGL context could not be created. Reason: ', event.statusMessage );
+
+	}
+
 	function onMaterialDispose( event ) {
 
 		const material = event.target;