Textures: Move to let/const.

src/textures/DataTexture3D.js

@@ -10,7 +10,7 @@ function DataTexture3D( data, width, height, depth ) {
 	// We're going to add .setXXX() methods for setting properties later.
 	// Users can still set in DataTexture3D directly.
 	//
-	//	var texture = new THREE.DataTexture3D( data, width, height, depth );
+	//	const texture = new THREE.DataTexture3D( data, width, height, depth );
 	// 	texture.anisotropy = 16;
 	//
 	// See #14839

src/textures/Texture.js

@@ -21,7 +21,7 @@ import { Vector2 } from '../math/Vector2.js';
 import { Matrix3 } from '../math/Matrix3.js';
 import { ImageUtils } from '../extras/ImageUtils.js';
 
-var textureId = 0;
+let textureId = 0;
 
 function Texture( image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {
 
@@ -134,7 +134,7 @@ Texture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
 
 	toJSON: function ( meta ) {
 
-		var isRootObject = ( meta === undefined || typeof meta === 'string' );
+		const isRootObject = ( meta === undefined || typeof meta === 'string' );
 
 		if ( ! isRootObject && meta.textures[ this.uuid ] !== undefined ) {
 
@@ -142,7 +142,7 @@ Texture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
 
 		}
 
-		var output = {
+		const output = {
 
 			metadata: {
 				version: 4.5,
@@ -181,7 +181,7 @@ Texture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
 
 			// TODO: Move to THREE.Image
 
-			var image = this.image;
+			const image = this.image;
 
 			if ( image.uuid === undefined ) {
 
@@ -191,7 +191,7 @@ Texture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
 
 			if ( ! isRootObject && meta.images[ image.uuid ] === undefined ) {
 
-				var url;
+				let url;
 
 				if ( Array.isArray( image ) ) {
 
@@ -199,7 +199,7 @@ Texture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {
 
 					url = [];
 
-					for ( var i = 0, l = image.length; i < l; i ++ ) {
+					for ( let i = 0, l = image.length; i < l; i ++ ) {
 
 						url.push( ImageUtils.getDataURL( image[ i ] ) );
 

src/textures/VideoTexture.js

@@ -26,7 +26,7 @@ VideoTexture.prototype = Object.assign( Object.create( Texture.prototype ), {
 
 	update: function () {
 
-		var video = this.image;
+		const video = this.image;
 
 		if ( video.readyState >= video.HAVE_CURRENT_DATA ) {