From d933a149e1f069fb69ccd3c686cd3ca5fd3a90de Mon Sep 17 00:00:00 2001
From: Chris Malley <cmalley@pixelzoom.com>
Date: Tue, 23 Aug 2016 17:53:14 -0600
Subject: [PATCH] use && pattern to add optional subcomponents, #261

---
 js/WavelengthSlider.js | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/js/WavelengthSlider.js b/js/WavelengthSlider.js
index 516c241e2..7dff1002f 100644
--- a/js/WavelengthSlider.js
+++ b/js/WavelengthSlider.js
@@ -177,12 +177,10 @@ define( function( require ) {
     thisNode.addChild( track );
     thisNode.addChild( trackBorder );
     thisNode.addChild( thumb );
-    if ( valueDisplay ) { thisNode.addChild( valueDisplay ); }
-    if ( cursor ) { thisNode.addChild( cursor ); }
-    if ( options.tweakersVisible ) {
-      thisNode.addChild( plusButton );
-      thisNode.addChild( minusButton );
-    }
+    valueDisplay && thisNode.addChild( valueDisplay );
+    cursor && thisNode.addChild( cursor );
+    plusButton && thisNode.addChild( plusButton );
+    minusButton && thisNode.addChild( minusButton );
 
     // layout
     if ( cursor ) { cursor.top = track.top; }