(function () {
    'use strict'; var document = typeof window !== 'undefined' && typeof window.document !== 'undefined' ? window.document : {}; var isCommonjs = typeof module !== 'undefined' && module.exports; var keyboardAllowed = typeof Element !== 'undefined' && 'ALLOW_KEYBOARD_INPUT' in Element; var fn = (function () {
        var val; var fnMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror'], ['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror'], ['webkitRequestFullScreen', 'webkitCancelFullScreen', 'webkitCurrentFullScreenElement', 'webkitCancelFullScreen', 'webkitfullscreenchange', 'webkitfullscreenerror'], ['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror'], ['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError']]; var i = 0; var l = fnMap.length; var ret = {}; for (; i < l; i++) {
            val = fnMap[i]; if (val && val[1] in document) {
                for (i = 0; i < val.length; i++) { ret[fnMap[0][i]] = val[i]; }
                return ret;
            }
        }
        return false;
    })(); var eventNameMap = { change: fn.fullscreenchange, error: fn.fullscreenerror }; var screenfull = {
        request: function (elem) {
            return new Promise(function (resolve) {
                var request = fn.requestFullscreen; var onFullScreenEntered = function () { this.off('change', onFullScreenEntered); resolve(); }.bind(this); elem = elem || document.documentElement; if (/ Version\/5\.1(?:\.\d+)? Safari\//.test(navigator.userAgent)) { elem[request](); } else { elem[request](keyboardAllowed ? Element.ALLOW_KEYBOARD_INPUT : {}); }
                this.on('change', onFullScreenEntered);
            }.bind(this));
        }, exit: function () { return new Promise(function (resolve) { var onFullScreenExit = function () { this.off('change', onFullScreenExit); resolve(); }.bind(this); document[fn.exitFullscreen](); this.on('change', onFullScreenExit); }.bind(this)); }, toggle: function (elem) { return this.isFullscreen ? this.exit() : this.request(elem); }, onchange: function (callback) { this.on('change', callback); }, onerror: function (callback) { this.on('error', callback); }, on: function (event, callback) { var eventName = eventNameMap[event]; if (eventName) { document.addEventListener(eventName, callback, false); } }, off: function (event, callback) { var eventName = eventNameMap[event]; if (eventName) { document.removeEventListener(eventName, callback, false); } }, raw: fn
    }; if (!fn) {
        if (isCommonjs) { module.exports = false; } else { window.screenfull = false; }
        return;
    }
    Object.defineProperties(screenfull, { isFullscreen: { get: function () { return Boolean(document[fn.fullscreenElement]); } }, element: { enumerable: true, get: function () { return document[fn.fullscreenElement]; } }, enabled: { enumerable: true, get: function () { return Boolean(document[fn.fullscreenEnabled]); } } }); if (isCommonjs) { module.exports = screenfull; } else { window.screenfull = screenfull; }
})();