From a03c9b244befb74e8ff948d242f9b3e1a22b5a33 Mon Sep 17 00:00:00 2001
From: Jonathan Olson <jonathan.olson@colorado.edu>
Date: Sat, 5 Mar 2022 08:36:16 -0700
Subject: [PATCH] TypeScript conversion for
 RectangularPushButton/PushButtonModel (and inherited types),
 Slider/SliderTrack (and associated types),
 NumberControl/ArrowButton/NumberDisplay, see
 https://github.com/phetsims/scenery-phet/issues/726

---
 js/common/view/MediumControlPanel.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/common/view/MediumControlPanel.ts b/js/common/view/MediumControlPanel.ts
index ab565003..5e9474b0 100644
--- a/js/common/view/MediumControlPanel.ts
+++ b/js/common/view/MediumControlPanel.ts
@@ -269,7 +269,7 @@ class MediumControlPanel extends Node {
     // add slider for index of refraction
     const indexOfRefractionSlider = new HSlider( this.mediumIndexProperty,
       new Range( INDEX_OF_REFRACTION_MIN, INDEX_OF_REFRACTION_MAX ), {
-        trackFill: 'white',
+        trackFillEnabled: 'white',
         trackSize: new Dimension2( sliderWidth, 1 ),
         thumbSize: new Dimension2( 10, 20 ),
         thumbTouchAreaYDilation: 8, // So it will not overlap the tweaker buttons