var -> const using eslint auto fix, phetsims/tasks#1012

js/capacitance/CapacitanceScreen.js

@@ -33,7 +33,7 @@ define( require => {
    */
   function CapacitanceScreen( switchUsedProperty, tandem ) {
 
-    var options = {
+    const options = {
       name: screenCapacitanceString,
       backgroundColorProperty: new Property( CLBConstants.SCREEN_VIEW_BACKGROUND_COLOR ),
       homeScreenIcon: new Image( capacitorIconImage ),

js/capacitance/model/CapacitanceModel.js

@@ -29,7 +29,7 @@ define( require => {
    */
   function CapacitanceModel( switchUsedProperty, modelViewTransform, tandem ) {
 
-    var circuitConfig = CircuitConfig.create( {
+    const circuitConfig = CircuitConfig.create( {
       circuitConnections: [ CircuitState.BATTERY_CONNECTED, CircuitState.OPEN_CIRCUIT ]
     } );
 

js/capacitance/view/CapacitanceCircuitNode.js

@@ -25,7 +25,7 @@ define( require => {
   function CapacitanceCircuitNode( model, tandem ) {
 
     CLBCircuitNode.call( this, model, tandem );
-    var self = this;
+    const self = this;
 
     Property.multilink( [ model.circuit.circuitConnectionProperty, model.currentVisibleProperty ],
       function( circuitConnection, currentIndicatorsVisible ) {
@@ -45,7 +45,7 @@ define( require => {
      * @param {boolean} currentIndicatorsVisible
      */
     updateCurrentVisibility: function( circuitConnection, currentIndicatorsVisible ) {
-      var isBatteryConnected = ( circuitConnection === CircuitState.BATTERY_CONNECTED );
+      const isBatteryConnected = ( circuitConnection === CircuitState.BATTERY_CONNECTED );
 
       this.batteryTopCurrentIndicatorNode.setVisible( isBatteryConnected && currentIndicatorsVisible );
       this.batteryBottomCurrentIndicatorNode.setVisible( isBatteryConnected && currentIndicatorsVisible );

js/capacitance/view/CapacitanceScreenView.js

@@ -43,7 +43,7 @@ define( require => {
     this.capacitanceCircuitNode = new CapacitanceCircuitNode( model, tandem.createTandem( 'capacitanceCircuitNode' ) );
 
     // meters
-    var voltmeterNode = new VoltmeterNode( model.voltmeter, this.modelViewTransform, model.voltmeterVisibleProperty, tandem.createTandem( 'voltmeterNode' ) );
+    const voltmeterNode = new VoltmeterNode( model.voltmeter, this.modelViewTransform, model.voltmeterVisibleProperty, tandem.createTandem( 'voltmeterNode' ) );
 
     // @public {DraggableTimerNode}
     var draggableTimerNode = new DraggableTimerNode(
@@ -79,20 +79,20 @@ define( require => {
     );
 
     // control
-    var viewControlPanel = new CLBViewControlPanel( model, tandem.createTandem( 'viewControlPanel' ), {
+    const viewControlPanel = new CLBViewControlPanel( model, tandem.createTandem( 'viewControlPanel' ), {
       maxTextWidth: 200
     } );
     viewControlPanel.rightTop = this.layoutBounds.rightTop.plus( new Vector2( -10, 10 ) );
     toolboxPanel.rightTop = viewControlPanel.rightBottom.plus( new Vector2( 0, 10 ) );
 
-    var capacitanceBarMeterPanel = new BarMeterPanel(
+    const capacitanceBarMeterPanel = new BarMeterPanel(
       model,
       tandem.createTandem( 'barMeterPanel' )
     );
     capacitanceBarMeterPanel.left = this.capacitanceCircuitNode.topWireNode.left - 40;
     capacitanceBarMeterPanel.top = this.layoutBounds.top + 10;
 
-    var resetAllButton = new ResetAllButton( {
+    const resetAllButton = new ResetAllButton( {
       listener: function() {
         model.reset();
       },

js/capacitor-lab-basics-main.js

@@ -22,9 +22,9 @@ define( require => {
   const capacitorLabBasicsTitleString = require( 'string!CAPACITOR_LAB_BASICS/capacitor-lab-basics.title' );
 
   // constants
-  var tandem = Tandem.rootTandem;
+  const tandem = Tandem.rootTandem;
 
-  var simOptions = {
+  const simOptions = {
     credits: {
       leadDesign: 'Amy Rouinfar',
       softwareDevelopment: 'Andrew Adare, Jesse Greenberg, Chris Malley, Emily Randall, Jonathan Olson',
@@ -37,13 +37,13 @@ define( require => {
 
     // Tracks whether a circuit switch has been changed by user. Once the switch has been changed in either screen,
     // the cue arrows (used to hint that the switch is available) should disappear from both screens.
-    var switchUsedProperty = new Property( false );
+    const switchUsedProperty = new Property( false );
 
-    var screens = [
+    const screens = [
       new CapacitanceScreen( switchUsedProperty, tandem.createTandem( 'capacitanceScreen' ) ),
       new CLBLightBulbScreen( switchUsedProperty, tandem.createTandem( 'lightBulbScreen' ) )
     ];
-    var sim = new Sim( capacitorLabBasicsTitleString, screens, simOptions );
+    const sim = new Sim( capacitorLabBasicsTitleString, screens, simOptions );
     sim.start();
   } );
 } );

js/common/CLBConstants.js

@@ -18,9 +18,9 @@ define( require => {
   const RangeWithValue = require( 'DOT/RangeWithValue' );
   const Vector3 = require( 'DOT/Vector3' );
 
-  var NEGATIVE = 'NEGATIVE';
-  var POSITIVE = 'POSITIVE';
-  var CLBConstants = {
+  const NEGATIVE = 'NEGATIVE';
+  const POSITIVE = 'POSITIVE';
+  const CLBConstants = {
 
     //----------------------------------------------------------------------------
     // Model

js/common/CLBQueryParameters.js

@@ -11,7 +11,7 @@ define( require => {
   // modules
   const capacitorLabBasics = require( 'CAPACITOR_LAB_BASICS/capacitorLabBasics' );
 
-  var CLBQueryParameters = QueryStringMachine.getAll( {
+  const CLBQueryParameters = QueryStringMachine.getAll( {
 
     // Provided as a customization for PhET-iO.
     // Removes the open-circuit switch state in the Light Bulb screen

js/common/model/Battery.js

@@ -24,24 +24,24 @@ define( require => {
 
   // constants
   // size of the associated image file, determined by visual inspection
-  var BODY_SIZE = new Dimension2( 0.0065, 0.01425 ); // dimensions of the rectangle that bounds the battery image
+  const BODY_SIZE = new Dimension2( 0.0065, 0.01425 ); // dimensions of the rectangle that bounds the battery image
 
   /*
    * Positive terminal is part of the image file.
    * The terminal is a cylinder, whose dimensions were determined by visual inspection.
    * The origin of the terminal is at the center of the cylinder's top.
    */
-  var POSITIVE_TERMINAL_ELLIPSE_SIZE = new Dimension2( 0.0025, 0.0005 );
-  var POSITIVE_TERMINAL_CYLINDER_HEIGHT = 0.0009;
-  var POSITIVE_TERMINAL_Y_OFFSET = -( BODY_SIZE.height / 2 ) - 0.00012;
+  const POSITIVE_TERMINAL_ELLIPSE_SIZE = new Dimension2( 0.0025, 0.0005 );
+  const POSITIVE_TERMINAL_CYLINDER_HEIGHT = 0.0009;
+  const POSITIVE_TERMINAL_Y_OFFSET = -( BODY_SIZE.height / 2 ) - 0.00012;
 
   /*
    * Negative terminal is part of the image file.
    * The terminal is an ellipse, whose dimension were determined by visual inspection.
    * The origin of the terminal is at the center of the ellipse.
    */
-  var NEGATIVE_TERMINAL_ELLIPSE_SIZE = new Dimension2( 0.0035, 0.0009 ); // Ellipse axes defining the negative terminal
-  var NEGATIVE_TERMINAL_Y_OFFSET = -( BODY_SIZE.height / 2 ) + 0.0006; // center of negative terminal when at the top
+  const NEGATIVE_TERMINAL_ELLIPSE_SIZE = new Dimension2( 0.0035, 0.0009 ); // Ellipse axes defining the negative terminal
+  const NEGATIVE_TERMINAL_Y_OFFSET = -( BODY_SIZE.height / 2 ) + 0.0006; // center of negative terminal when at the top
 
   /**
    * @constructor
@@ -69,7 +69,7 @@ define( require => {
       phetioType: PropertyIO( StringIO )
     } );
 
-    var self = this;
+    const self = this;
 
     // @public {Dimension2}
     this.positiveTerminalEllipseSize = POSITIVE_TERMINAL_ELLIPSE_SIZE;
@@ -116,7 +116,7 @@ define( require => {
      * @returns {boolean}
      */
     contacts: function( probe ) {
-      var shape;
+      let shape;
       if ( this.polarityProperty.value === CLBConstants.POLARITY.POSITIVE ) {
         shape = this.positiveTerminalShape;
       }

js/common/model/CLBModel.js

@@ -27,7 +27,7 @@ define( require => {
 
   // constants
   // reference coordinate frame size for world nodes
-  var CANVAS_RENDERING_SIZE = new Dimension2( 1024, 618 );
+  const CANVAS_RENDERING_SIZE = new Dimension2( 1024, 618 );
 
   /**
    * @constructor
@@ -149,8 +149,8 @@ define( require => {
      */
     getMaxPlateCharge: function() {
 
-      var maxArea = CLBConstants.PLATE_WIDTH_RANGE.max * CLBConstants.PLATE_WIDTH_RANGE.max;
-      var maxVoltage = CLBConstants.BATTERY_VOLTAGE_RANGE.max;
+      const maxArea = CLBConstants.PLATE_WIDTH_RANGE.max * CLBConstants.PLATE_WIDTH_RANGE.max;
+      const maxVoltage = CLBConstants.BATTERY_VOLTAGE_RANGE.max;
 
       return CLBConstants.EPSILON_0 * maxArea * maxVoltage / CLBConstants.PLATE_SEPARATION_RANGE.min;
     },
@@ -168,8 +168,8 @@ define( require => {
      */
     getMaxEffectiveEField: function() {
 
-      var maxArea = CLBConstants.PLATE_WIDTH_RANGE.max * CLBConstants.PLATE_WIDTH_RANGE.max;
-      var minArea = CLBConstants.PLATE_WIDTH_RANGE.min * CLBConstants.PLATE_WIDTH_RANGE.min;
+      const maxArea = CLBConstants.PLATE_WIDTH_RANGE.max * CLBConstants.PLATE_WIDTH_RANGE.max;
+      const minArea = CLBConstants.PLATE_WIDTH_RANGE.min * CLBConstants.PLATE_WIDTH_RANGE.min;
 
       return maxArea / minArea * CLBConstants.BATTERY_VOLTAGE_RANGE.max / CLBConstants.PLATE_SEPARATION_RANGE.min;
     },
@@ -185,7 +185,7 @@ define( require => {
       if ( this.isPlayingProperty.value || isManual ) {
 
         // If a manual step is called the dt should be the same a normal dt value.
-        var adjustedDt = isManual ? dt : dt * ( this.isSlowMotionProperty.value ? 0.125 : 1 );
+        const adjustedDt = isManual ? dt : dt * ( this.isSlowMotionProperty.value ? 0.125 : 1 );
         this.circuit.step( adjustedDt );
         this.stepEmitter.emit( adjustedDt );
         if ( this.isRunningProperty.value ) {

js/common/model/CLBModelViewTransform3D.js

@@ -29,8 +29,8 @@ define( require => {
 
   // Scratch variable for performance
   // @private
-  var scratchVector2 = new Vector2( 0, 0 );
-  var scratchVector3 = new Vector3( 0, 0, 0 );
+  const scratchVector2 = new Vector2( 0, 0 );
+  const scratchVector3 = new Vector3( 0, 0, 0 );
 
   /**
    * @constructor
@@ -100,7 +100,7 @@ define( require => {
      * @returns {Vector2}
      */
     modelToViewDelta: function( delta ) {
-      var origin = this.modelToViewPosition( scratchVector3.setXYZ( 0, 0, 0 ) );
+      const origin = this.modelToViewPosition( scratchVector3.setXYZ( 0, 0, 0 ) );
       return this.modelToViewPosition( delta ).minus( origin );
     },
 
@@ -175,7 +175,7 @@ define( require => {
      * @returns {Vector3}
      */
     viewToModelDelta: function( delta ) {
-      var origin = this.viewToModelPosition( scratchVector2.setXY( 0, 0 ) );
+      const origin = this.viewToModelPosition( scratchVector2.setXY( 0, 0 ) );
 
       return this.viewToModelPosition( delta ).minus( origin );
     },

js/common/model/Capacitor.js

@@ -71,7 +71,7 @@ define( require => {
     this.shapeCreator = new BoxShapeCreator( config.modelViewTransform );
 
     // Square plates.
-    var plateBounds = new Bounds3( 0, 0, 0, options.plateWidth, CLBConstants.PLATE_HEIGHT, options.plateWidth );
+    const plateBounds = new Bounds3( 0, 0, 0, options.plateWidth, CLBConstants.PLATE_HEIGHT, options.plateWidth );
 
     // @public {Property.<Bounds3>}
     this.plateSizeProperty = new Property( plateBounds, {
@@ -109,7 +109,7 @@ define( require => {
     this.plateChargeProperty = new DerivedProperty( [ this.capacitanceProperty, this.plateVoltageProperty, circuitConnectionProperty ],
       function( capacitance, voltage, circuitConnection ) {
         if ( circuitConnection ) {
-          var charge = capacitance * voltage;
+          let charge = capacitance * voltage;
 
           // Force an underflow to zero below the threshold for stability
           if ( Math.abs( charge ) < CLBConstants.MIN_PLATE_CHARGE ) {
@@ -148,7 +148,7 @@ define( require => {
 
     // link the top and bottom circuit switches together so that they rotate together
     // as the user drags
-    var self = this;
+    const self = this;
 
     // JS handles negative numbers precisely so there will not be an infinite
     // loop here due to mutual recursion.
@@ -228,16 +228,16 @@ define( require => {
       assert && assert( location === CircuitLocation.CAPACITOR_TOP || location === CircuitLocation.CAPACITOR_BOTTOM,
         'Invalid capacitor location: ' + location );
 
-      var shape;
-      var size = this.plateSizeProperty.value;
+      let shape;
+      const size = this.plateSizeProperty.value;
       if ( location === CircuitLocation.CAPACITOR_TOP ) {
         shape = this.shapeCreator.createBoxShape( this.location.x, this.getTopConnectionPoint().y, this.location.z, size.width, size.height, size.depth );
       }
       else if ( location === CircuitLocation.CAPACITOR_BOTTOM ) {
         shape = this.shapeCreator.createBoxShape( this.location.x, this.location.y + this.plateSeparationProperty.value / 2, this.location.z, size.width, size.height, size.depth );
       }
 
-      var contacts = probe.bounds.intersectsBounds( shape.bounds ) &&
+      let contacts = probe.bounds.intersectsBounds( shape.bounds ) &&
                      probe.shapeIntersection( shape ).getNonoverlappingArea() > 0;
 
       if ( !contacts && location === CircuitLocation.CAPACITOR_TOP ) {
@@ -260,7 +260,7 @@ define( require => {
      * @returns {number} Volts/meter
      */
     getEffectiveEField: function() {
-      var plateCharge = this.plateChargeProperty.value;
+      const plateCharge = this.plateChargeProperty.value;
       if ( Math.abs( plateCharge ) < CLBConstants.MIN_PLATE_CHARGE ) {
         return 0;
       }
@@ -285,10 +285,10 @@ define( require => {
      * @param {number} dt
      */
     discharge: function( R, dt ) {
-      var C = this.capacitanceProperty.value;
+      const C = this.capacitanceProperty.value;
 
       this.transientTime += dt; // step time since switch was closed
-      var exp = Math.exp( -this.transientTime / ( R * C ) );
+      const exp = Math.exp( -this.transientTime / ( R * C ) );
       this.plateVoltageProperty.value = this.voltageAtSwitchClose * exp;
 
       this.previousCapacitance = C;
@@ -315,7 +315,7 @@ define( require => {
     updateDischargeParameters: function() {
 
       // in the discharge function, C is recalculated every time step, so we only need to adjust Vo.
-      var capacitanceRatio = this.capacitanceProperty.value / this.previousCapacitance;
+      const capacitanceRatio = this.capacitanceProperty.value / this.previousCapacitance;
 
       // update the initial voltage Vo
       this.voltageAtSwitchClose = this.plateVoltageProperty.value / capacitanceRatio;

js/common/model/CircuitConfig.js

@@ -18,13 +18,13 @@ define( require => {
   const CLBModelViewTransform3D = require( 'CAPACITOR_LAB_BASICS/common/model/CLBModelViewTransform3D' );
 
   // Constants with default assignments
-  var CAPACITOR_X_SPACING = 0.024; // meters
-  var CAPACITOR_Y_SPACING = 0; // meters
-  var PLATE_WIDTH = CLBConstants.PLATE_WIDTH_RANGE.defaultValue;
-  var PLATE_SEPARATION = CLBConstants.PLATE_SEPARATION_RANGE.defaultValue;
-  var WIRE_EXTENT = 0.016; // how far the wire extends above or below the capacitor (meters)
+  const CAPACITOR_X_SPACING = 0.024; // meters
+  const CAPACITOR_Y_SPACING = 0; // meters
+  const PLATE_WIDTH = CLBConstants.PLATE_WIDTH_RANGE.defaultValue;
+  const PLATE_SEPARATION = CLBConstants.PLATE_SEPARATION_RANGE.defaultValue;
+  const WIRE_EXTENT = 0.016; // how far the wire extends above or below the capacitor (meters)
 
-  var CircuitConfig = {
+  const CircuitConfig = {
 
     /**
      * Returns the default circuit config, overridden with any options.

js/common/model/CircuitLocation.js

@@ -10,7 +10,7 @@ define( require => {
 
   const capacitorLabBasics = require( 'CAPACITOR_LAB_BASICS/capacitorLabBasics' );
 
-  var CircuitLocation = {
+  const CircuitLocation = {
     BATTERY_TOP: 'BATTERY_TOP',
     BATTERY_BOTTOM: 'BATTERY_BOTTOM',
     LIGHT_BULB_TOP: 'LIGHT_BULB_TOP',

js/common/model/CircuitState.js

@@ -13,7 +13,7 @@ define( require => {
 
   const capacitorLabBasics = require( 'CAPACITOR_LAB_BASICS/capacitorLabBasics' );
 
-  var CircuitState = {
+  const CircuitState = {
     BATTERY_CONNECTED: 'BATTERY_CONNECTED',
     LIGHT_BULB_CONNECTED: 'LIGHT_BULB_CONNECTED',
     OPEN_CIRCUIT: 'OPEN_CIRCUIT',