From 03d45a130d10a0d52bec1135a6e3943f78cbd118 Mon Sep 17 00:00:00 2001
From: Jesse <jesse.greenberg@colorado.edu>
Date: Wed, 16 Mar 2022 12:32:28 -0400
Subject: [PATCH] Only run `fuzzBoardEvents` if the document has focus, see
 https://github.com/phetsims/aqua/issues/134

---
 js/SimDisplay.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/SimDisplay.js b/js/SimDisplay.js
index 7d8e4af5..bd06e7a8 100644
--- a/js/SimDisplay.js
+++ b/js/SimDisplay.js
@@ -185,7 +185,7 @@ class SimDisplay extends Display {
     }
 
     // fire or synthesize keyboard input events
-    if ( phet.chipper.queryParameters.fuzzBoard ) {
+    if ( phet.chipper.queryParameters.fuzzBoard && document.hasFocus() ) {
       assert && assert( phet.chipper.queryParameters.supportsInteractiveDescription, 'fuzzBoard can only run with interactive description enabled.' );
       this.keyboardFuzzer.fuzzBoardEvents( phet.chipper.queryParameters.fuzzRate );
     }