three.js/editor/js/Menubar.View.js

import { UIPanel, UIRow } from './libs/ui.js';

function MenubarView( editor ) {

	var container = new UIPanel();
	container.setClass( 'menu' );

	var title = new UIPanel();
	title.setClass( 'title' );
	title.setTextContent( 'View' );
	container.add( title );

	var options = new UIPanel();
	options.setClass( 'options' );
	container.add( options );

	// Fullscreen

	var option = new UIRow();
	option.setClass( 'option' );
	option.setTextContent( 'Fullscreen' );
	option.onClick( function () {

		if ( document.fullscreenElement === null ) {

			document.documentElement.requestFullscreen();

		} else if ( document.exitFullscreen ) {

			document.exitFullscreen();

		}

		// Safari

		if ( document.webkitFullscreenElement === null ) {

			document.documentElement.webkitRequestFullscreen();

		} else if ( document.webkitExitFullscreen ) {

			document.webkitExitFullscreen();

		}

	} );
	options.add( option );

	return container;

}

export { MenubarView };