phaser/src/core/events/FOCUS_EVENT.js

/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2019 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */

/**
 * The Game Focus Event.
 * 
 * This event is dispatched by the Game Visibility Handler when the window in which the Game instance is embedded
 * enters a focused state. The focus event is raised when the window re-gains focus, having previously lost it.
 *
 * @event Phaser.Core.Events#FOCUS
 * @since 3.0.0
 */
module.exports = 'focus';