From efd5bb642630afcf907c72ce13f072bec1eea0e9 Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Tue, 31 Oct 2017 09:18:09 -0700
Subject: [PATCH] WebGLRenderer: Check if device.isConnected before requesting
 frame.

---
 src/renderers/WebGLRenderer.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index 74338826a5..a523e22c99 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -1024,7 +1024,10 @@ function WebGLRenderer( parameters ) {
 	function start() {
 
 		if ( isAnimating ) return;
-		( vr.getDevice() || window ).requestAnimationFrame( loop );
+
+		var device = vr.getDevice();
+		( ( device && device.isConnected ) || window ).requestAnimationFrame( loop );
+
 		isAnimating = true;
 
 	}
@@ -1032,7 +1035,9 @@ function WebGLRenderer( parameters ) {
 	function loop( time ) {
 
 		if ( onAnimationFrame !== null ) onAnimationFrame( time );
-		( vr.getDevice() || window ).requestAnimationFrame( loop );
+
+		var device = vr.getDevice();
+		( ( device && device.isConnected ) || window ).requestAnimationFrame( loop );
 
 	}
 
-- 
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