Updated generated jsm files.

examples/jsm/controls/OrbitControls.js

@@ -546,32 +546,44 @@ var OrbitControls = function ( object, domElement ) {
 
 	function handleKeyDown( event ) {
 
-		//console.log( 'handleKeyDown' );
+		// console.log( 'handleKeyDown' );
+
+		var needsUpdate = false;
 
 		switch ( event.keyCode ) {
 
 			case scope.keys.UP:
 				pan( 0, scope.keyPanSpeed );
-				scope.update();
+				needsUpdate = true;
 				break;
 
 			case scope.keys.BOTTOM:
 				pan( 0, - scope.keyPanSpeed );
-				scope.update();
+				needsUpdate = true;
 				break;
 
 			case scope.keys.LEFT:
 				pan( scope.keyPanSpeed, 0 );
-				scope.update();
+				needsUpdate = true;
 				break;
 
 			case scope.keys.RIGHT:
 				pan( - scope.keyPanSpeed, 0 );
-				scope.update();
+				needsUpdate = true;
 				break;
 
 		}
 
+		if ( needsUpdate ) {
+
+			// prevent the browser from scrolling on cursor keys
+			event.preventDefault();
+
+			scope.update();
+
+		}
+
+
 	}
 
 	function handleTouchStartRotate( event ) {
@@ -682,8 +694,15 @@ var OrbitControls = function ( object, domElement ) {
 
 		if ( scope.enabled === false ) return;
 
+		// Prevent the browser from scrolling.
+
 		event.preventDefault();
 
+		// Manually set the focus since calling preventDefault above
+		// prevents the browser from setting it automatically.
+
+		scope.domElement.focus ? scope.domElement.focus() : window.focus();
+
 		switch ( event.button ) {
 
 			case scope.mouseButtons.LEFT:

examples/jsm/controls/TrackballControls.js

@@ -499,7 +499,7 @@ var TrackballControls = function ( object, domElement ) {
 	function touchstart( event ) {
 
 		if ( _this.enabled === false ) return;
-
+		
 		event.preventDefault();
 
 		switch ( event.touches.length ) {