WebGLRenderer: use ES6 default value for `setSize` (#25486)

* WebGLRenderer: use ES6 default value for `setSize`

* make more explicit style

src/renderers/WebGLRenderer.js

@@ -389,7 +389,7 @@ function WebGLRenderer( parameters = {} ) {
 
 	};
 
-	this.setSize = function ( width, height, updateStyle ) {
+	this.setSize = function ( width, height, updateStyle = true ) {
 
 		if ( xr.isPresenting ) {
 
@@ -404,7 +404,7 @@ function WebGLRenderer( parameters = {} ) {
 		_canvas.width = Math.floor( width * _pixelRatio );
 		_canvas.height = Math.floor( height * _pixelRatio );
 
-		if ( updateStyle !== false ) {
+		if ( updateStyle === true ) {
 
 			_canvas.style.width = width + 'px';
 			_canvas.style.height = height + 'px';