From 1918258f300cbe3a041f7c3068761597d2c47dbd Mon Sep 17 00:00:00 2001
From: Sam Reid <reids@colorado.edu>
Date: Sat, 1 Nov 2014 12:56:34 -0600
Subject: [PATCH] Throw an error if an illegal screenDisplayStrategy is
 specified, see #96

---
 js/Sim.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/js/Sim.js b/js/Sim.js
index fcb2f040..0270f4f0 100644
--- a/js/Sim.js
+++ b/js/Sim.js
@@ -423,6 +423,9 @@ define( function( require ) {
         updateBackground();
       } );
     }
+    else {
+      throw new Error( "invalid value for options.screenDisplayStrategy: " + options.screenDisplayStrategy );
+    }
 
     // layer for popups, dialogs, and their backgrounds and barriers
     this.topLayer = new Node( { renderer: 'svg' } );