(function () {
    var AjaxMonitor, Bar, DocumentMonitor, ElementMonitor, ElementTracker, EventLagMonitor, Evented, Events,
        NoTargetError, Pace, RequestIntercept, SOURCE_KEYS, Scaler, SocketRequestTracker, XHRRequestTracker, _WebSocket,
        _XDomainRequest, _XMLHttpRequest, _intercept, _pushState, _replaceState, animation, avgAmplitude, bar,
        cancelAnimation, cancelAnimationFrame, defaultOptions, extend, extendNative, getFromDOM, getIntercept,
        handlePushState, ignoreStack, init, k, len, now, options, ref, requestAnimationFrame, result, runAnimation,
        scalers, shouldIgnoreURL, shouldTrack, source, sources, uniScaler,
        slice = [].slice,
        hasProp = {}.hasOwnProperty,
        extend1 = function (child, parent) {
            for (var key in parent) {
                if (hasProp.call(parent, key)) child[key] = parent[key];
            }

            function ctor() {
                this.constructor = child;
            }

            ctor.prototype = parent.prototype;
            child.prototype = new ctor();
            child.__super__ = parent.prototype;
            return child;
        },
        indexOf = [].indexOf || function (item) {
            for (var i = 0, l = this.length; i < l; i++) {
                if (i in this && this[i] === item) return i;
            }
            return -1;
        };

    defaultOptions = {
        catchupTime: 100,
        initialRate: .03,
        minTime: 250,
        ghostTime: 100,
        maxProgressPerFrame: 20,
        easeFactor: 1.25,
        startOnPageLoad: true,
        restartOnPushState: true,
        restartOnRequestAfter: 500,
        target: 'body',
        elements: {
            checkInterval: 100,
            selectors: ['body']
        },
        eventLag: {
            minSamples: 10,
            sampleCount: 3,
            lagThreshold: 3
        },
        ajax: {
            trackMethods: ['GET'],
            trackWebSockets: true,
            ignoreURLs: []
        }
    };

    now = function () {
        var ref;
        return (ref = typeof performance !== "undefined" && performance !== null ? typeof performance.now === "function" ? performance.now() : void 0 : void 0) != null ? ref : +(new Date);
    };

    requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;

    cancelAnimationFrame = window.cancelAnimationFrame || window.mozCancelAnimationFrame;

    if (requestAnimationFrame == null) {
        requestAnimationFrame = function (fn) {
            return setTimeout(fn, 50);
        };
        cancelAnimationFrame = function (id) {
            return clearTimeout(id);
        };
    }

    runAnimation = function (fn) {
        var last, tick;
        last = now();
        tick = function () {
            var diff;
            diff = now() - last;
            if (diff >= 33) {
                last = now();
                return fn(diff, function () {
                    return requestAnimationFrame(tick);
                });
            } else {
                return setTimeout(tick, 33 - diff);
            }
        };
        return tick();
    };

    result = function () {
        var args, key, obj;
        obj = arguments[0], key = arguments[1], args = 3 <= arguments.length ? slice.call(arguments, 2) : [];
        if (typeof obj[key] === 'function') {
            return obj[key].apply(obj, args);
        } else {
            return obj[key];
        }
    };

    extend = function () {
        var k, key, len, out, source, sources, val;
        out = arguments[0], sources = 2 <= arguments.length ? slice.call(arguments, 1) : [];
        for (k = 0, len = sources.length; k < len; k++) {
            source = sources[k];
            if (source) {
                for (key in source) {
                    if (!hasProp.call(source, key)) continue;
                    val = source[key];
                    if ((out[key] != null) && typeof out[key] === 'object' && (val != null) && typeof val === 'object') {
                        extend(out[key], val);
                    } else {
                        out[key] = val;
                    }
                }
            }
        }
        return out;
    };

    avgAmplitude = function (arr) {
        var count, k, len, sum, v;
        sum = count = 0;
        for (k = 0, len = arr.length; k < len; k++) {
            v = arr[k];
            sum += Math.abs(v);
            count++;
        }
        return sum / count;
    };

    getFromDOM = function (key, json) {
        var data, e, el, error;
        if (key == null) {
            key = 'options';
        }
        if (json == null) {
            json = true;
        }
        el = document.querySelector("[data-pace-" + key + "]");
        if (!el) {
            return;
        }
        data = el.getAttribute("data-pace-" + key);
        if (!json) {
            return data;
        }
        try {
            return JSON.parse(data);
        } catch (error) {
            e = error;
            return typeof console !== "undefined" && console !== null ? console.error("Error parsing inline pace options", e) : void 0;
        }
    };

    Evented = (function () {
        function Evented() {
        }

        Evented.prototype.on = function (event, handler, ctx, once) {
            var base;
            if (once == null) {
                once = false;
            }
            if (this.bindings == null) {
                this.bindings = {};
            }
            if ((base = this.bindings)[event] == null) {
                base[event] = [];
            }
            return this.bindings[event].push({
                handler: handler,
                ctx: ctx,
                once: once
            });
        };

        Evented.prototype.once = function (event, handler, ctx) {
            return this.on(event, handler, ctx, true);
        };

        Evented.prototype.off = function (event, handler) {
            var i, ref, results;
            if (((ref = this.bindings) != null ? ref[event] : void 0) == null) {
                return;
            }
            if (handler == null) {
                return delete this.bindings[event];
            } else {
                i = 0;
                results = [];
                while (i < this.bindings[event].length) {
                    if (this.bindings[event][i].handler === handler) {
                        results.push(this.bindings[event].splice(i, 1));
                    } else {
                        results.push(i++);
                    }
                }
                return results;
            }
        };

        Evented.prototype.trigger = function () {
            var args, ctx, event, handler, i, once, ref, ref1, results;
            event = arguments[0], args = 2 <= arguments.length ? slice.call(arguments, 1) : [];
            if ((ref = this.bindings) != null ? ref[event] : void 0) {
                i = 0;
                results = [];
                while (i < this.bindings[event].length) {
                    ref1 = this.bindings[event][i], handler = ref1.handler, ctx = ref1.ctx, once = ref1.once;
                    handler.apply(ctx != null ? ctx : this, args);
                    if (once) {
                        results.push(this.bindings[event].splice(i, 1));
                    } else {
                        results.push(i++);
                    }
                }
                return results;
            }
        };

        return Evented;

    })();

    Pace = window.Pace || {};

    window.Pace = Pace;

    extend(Pace, Evented.prototype);

    options = Pace.options = extend({}, defaultOptions, window.paceOptions, getFromDOM());

    ref = ['ajax', 'document', 'eventLag', 'elements'];
    for (k = 0, len = ref.length; k < len; k++) {
        source = ref[k];
        if (options[source] === true) {
            options[source] = defaultOptions[source];
        }
    }

    NoTargetError = (function (superClass) {
        extend1(NoTargetError, superClass);

        function NoTargetError() {
            return NoTargetError.__super__.constructor.apply(this, arguments);
        }

        return NoTargetError;

    })(Error);

    Bar = (function () {
        function Bar() {
            this.progress = 0;
        }

        Bar.prototype.getElement = function () {
            var targetElement;
            if (this.el == null) {
                targetElement = document.querySelector(options.target);
                if (!targetElement) {
                    throw new NoTargetError;
                }
                this.el = document.createElement('div');
                this.el.classList.add('pace');
                this.el.classList.add('pace-active');
                document.body.classList.remove('pace-done');
                document.body.classList.add('pace-running');
                this.el.innerHTML = '<div class="pace-progress">\n  <div class="pace-progress-inner"></div>\n</div>\n<div class="pace-activity"></div>';
                if (targetElement.firstChild != null) {
                    targetElement.insertBefore(this.el, targetElement.firstChild);
                } else {
                    targetElement.appendChild(this.el);
                }
            }
            return this.el;
        };

        Bar.prototype.finish = function () {
            var el;
            el = this.getElement();
            el.classList.remove('pace-active');
            el.classList.add('pace-inactive');
            document.body.classList.remove('pace-running');
            return document.body.classList.add('pace-done');
        };

        Bar.prototype.update = function (prog) {
            this.progress = prog;
            return this.render();
        };

        Bar.prototype.destroy = function () {
            var error;
            try {
                this.getElement().parentNode.removeChild(this.getElement());
            } catch (error) {
                NoTargetError = error;
            }
            return this.el = void 0;
        };

        Bar.prototype.render = function () {
            var el, key, l, len1, progressStr, ref1, transform;
            if (document.querySelector(options.target) == null) {
                return false;
            }
            el = this.getElement();
            transform = "translate3d(" + this.progress + "%, 0, 0)";
            ref1 = ['webkitTransform', 'msTransform', 'transform'];
            for (l = 0, len1 = ref1.length; l < len1; l++) {
                key = ref1[l];
                el.children[0].style[key] = transform;
            }
            if (!this.lastRenderedProgress || this.lastRenderedProgress | 0 !== this.progress | 0) {
                el.children[0].setAttribute('data-progress-text', (this.progress | 0) + "%");
                if (this.progress >= 100) {
                    progressStr = '99';
                } else {
                    progressStr = this.progress < 10 ? "0" : "";
                    progressStr += this.progress | 0;
                }
                el.children[0].setAttribute('data-progress', "" + progressStr);
            }
            return this.lastRenderedProgress = this.progress;
        };

        Bar.prototype.done = function () {
            return this.progress >= 100;
        };

        return Bar;

    })();

    Events = (function () {
        function Events() {
            this.bindings = {};
        }

        Events.prototype.trigger = function (name, val) {
            var binding, l, len1, ref1, results;
            if (this.bindings[name] != null) {
                ref1 = this.bindings[name];
                results = [];
                for (l = 0, len1 = ref1.length; l < len1; l++) {
                    binding = ref1[l];
                    results.push(binding.call(this, val));
                }
                return results;
            }
        };

        Events.prototype.on = function (name, fn) {
            var base;
            if ((base = this.bindings)[name] == null) {
                base[name] = [];
            }
            return this.bindings[name].push(fn);
        };

        return Events;

    })();

    _XMLHttpRequest = window.XMLHttpRequest;

    _XDomainRequest = window.XDomainRequest;

    _WebSocket = window.WebSocket;

    extendNative = function (to, from) {
        var e, error, key, results;
        results = [];
        for (key in from.prototype) {
            try {
                if ((to[key] == null) && typeof from[key] !== 'function') {
                    if (typeof Object.defineProperty === 'function') {
                        results.push(Object.defineProperty(to, key, {
                            get: function () {
                                return from.prototype[key];
                            },
                            configurable: true,
                            enumerable: true
                        }));
                    } else {
                        results.push(to[key] = from.prototype[key]);
                    }
                } else {
                    results.push(void 0);
                }
            } catch (error) {
                e = error;
            }
        }
        return results;
    };

    ignoreStack = [];

    Pace.ignore = function () {
        var args, fn, ret;
        fn = arguments[0], args = 2 <= arguments.length ? slice.call(arguments, 1) : [];
        ignoreStack.unshift('ignore');
        ret = fn.apply(null, args);
        ignoreStack.shift();
        return ret;
    };

    Pace.track = function () {
        var args, fn, ret;
        fn = arguments[0], args = 2 <= arguments.length ? slice.call(arguments, 1) : [];
        ignoreStack.unshift('track');
        ret = fn.apply(null, args);
        ignoreStack.shift();
        return ret;
    };

    shouldTrack = function (method) {
        var ref1;
        if (method == null) {
            method = 'GET';
        }
        if (ignoreStack[0] === 'track') {
            return 'force';
        }
        if (!ignoreStack.length && options.ajax) {
            if (method === 'socket' && options.ajax.trackWebSockets) {
                return true;
            } else if (ref1 = method.toUpperCase(), indexOf.call(options.ajax.trackMethods, ref1) >= 0) {
                return true;
            }
        }
        return false;
    };

    RequestIntercept = (function (superClass) {
        extend1(RequestIntercept, superClass);

        function RequestIntercept() {
            var monitorXHR;
            RequestIntercept.__super__.constructor.apply(this, arguments);
            monitorXHR = (function (_this) {
                return function (req) {
                    var _open;
                    _open = req.open;
                    return req.open = function (type, url, async) {
                        if (shouldTrack(type)) {
                            _this.trigger('request', {
                                type: type,
                                url: url,
                                request: req
                            });
                        }
                        return _open.apply(req, arguments);
                    };
                };
            })(this);
            window.XMLHttpRequest = function (flags) {
                var req;
                req = new _XMLHttpRequest(flags);
                monitorXHR(req);
                return req;
            };
            try {
                extendNative(window.XMLHttpRequest, _XMLHttpRequest);
            } catch (undefined) {
            }
            if (_XDomainRequest != null) {
                window.XDomainRequest = function () {
                    var req;
                    req = new _XDomainRequest;
                    monitorXHR(req);
                    return req;
                };
                try {
                    extendNative(window.XDomainRequest, _XDomainRequest);
                } catch (undefined) {
                }
            }
            if ((_WebSocket != null) && options.ajax.trackWebSockets) {
                window.WebSocket = (function (_this) {
                    return function (url, protocols) {
                        var req;
                        if (protocols != null) {
                            req = new _WebSocket(url, protocols);
                        } else {
                            req = new _WebSocket(url);
                        }
                        if (shouldTrack('socket')) {
                            _this.trigger('request', {
                                type: 'socket',
                                url: url,
                                protocols: protocols,
                                request: req
                            });
                        }
                        return req;
                    };
                })(this);
                try {
                    extendNative(window.WebSocket, _WebSocket);
                } catch (undefined) {
                }
            }
        }

        return RequestIntercept;

    })(Events);

    _intercept = null;

    getIntercept = function () {
        if (_intercept == null) {
            _intercept = new RequestIntercept;
        }
        return _intercept;
    };

    shouldIgnoreURL = function (url) {
        var l, len1, pattern, ref1;
        ref1 = options.ajax.ignoreURLs;
        for (l = 0, len1 = ref1.length; l < len1; l++) {
            pattern = ref1[l];
            if (typeof pattern === 'string') {
                if (url.indexOf(pattern) !== -1) {
                    return true;
                }
            } else {
                if (pattern.test(url)) {
                    return true;
                }
            }
        }
        return false;
    };

    getIntercept().on('request', function (arg) {
        var after, args, request, type, url;
        type = arg.type, request = arg.request, url = arg.url;
        if (shouldIgnoreURL(url)) {
            return;
        }
        if (!Pace.running && (options.restartOnRequestAfter !== false || shouldTrack(type) === 'force')) {
            args = arguments;
            after = options.restartOnRequestAfter || 0;
            if (typeof after === 'boolean') {
                after = 0;
            }
            return setTimeout(function () {
                var l, len1, ref1, ref2, results, stillActive;
                if (type === 'socket') {
                    stillActive = request.readyState < 2;
                } else {
                    stillActive = (0 < (ref1 = request.readyState) && ref1 < 4);
                }
                if (stillActive) {
                    Pace.restart();
                    ref2 = Pace.sources;
                    results = [];
                    for (l = 0, len1 = ref2.length; l < len1; l++) {
                        source = ref2[l];
                        if (source instanceof AjaxMonitor) {
                            source.watch.apply(source, args);
                            break;
                        } else {
                            results.push(void 0);
                        }
                    }
                    return results;
                }
            }, after);
        }
    });

    AjaxMonitor = (function () {
        function AjaxMonitor() {
            this.elements = [];
            getIntercept().on('request', (function (_this) {
                return function () {
                    return _this.watch.apply(_this, arguments);
                };
            })(this));
        }

        AjaxMonitor.prototype.watch = function (arg) {
            var request, tracker, type, url;
            type = arg.type, request = arg.request, url = arg.url;
            if (shouldIgnoreURL(url)) {
                return;
            }
            if (type === 'socket') {
                tracker = new SocketRequestTracker(request);
            } else {
                tracker = new XHRRequestTracker(request);
            }
            return this.elements.push(tracker);
        };

        return AjaxMonitor;

    })();

    XHRRequestTracker = (function () {
        function XHRRequestTracker(request) {
            var _onreadystatechange, event, l, len1, ref1, size;
            this.progress = 0;
            if (window.ProgressEvent != null) {
                size = null;
                request.addEventListener('progress', (function (_this) {
                    return function (evt) {
                        if (evt.lengthComputable) {
                            return _this.progress = 100 * evt.loaded / evt.total;
                        } else {
                            return _this.progress = _this.progress + (100 - _this.progress) / 2;
                        }
                    };
                })(this), false);
                ref1 = ['load', 'abort', 'timeout', 'error'];
                for (l = 0, len1 = ref1.length; l < len1; l++) {
                    event = ref1[l];
                    request.addEventListener(event, (function (_this) {
                        return function () {
                            return _this.progress = 100;
                        };
                    })(this), false);
                }
            } else {
                _onreadystatechange = request.onreadystatechange;
                request.onreadystatechange = (function (_this) {
                    return function () {
                        var ref2;
                        if ((ref2 = request.readyState) === 0 || ref2 === 4) {
                            _this.progress = 100;
                        } else if (request.readyState === 3) {
                            _this.progress = 50;
                        }
                        return typeof _onreadystatechange === "function" ? _onreadystatechange.apply(null, arguments) : void 0;
                    };
                })(this);
            }
        }

        return XHRRequestTracker;

    })();

    SocketRequestTracker = (function () {
        function SocketRequestTracker(request) {
            var event, l, len1, ref1;
            this.progress = 0;
            ref1 = ['error', 'open'];
            for (l = 0, len1 = ref1.length; l < len1; l++) {
                event = ref1[l];
                request.addEventListener(event, (function (_this) {
                    return function () {
                        return _this.progress = 100;
                    };
                })(this), false);
            }
        }

        return SocketRequestTracker;

    })();

    ElementMonitor = (function () {
        function ElementMonitor(options) {
            var l, len1, ref1, selector;
            if (options == null) {
                options = {};
            }
            this.elements = [];
            if (options.selectors == null) {
                options.selectors = [];
            }
            ref1 = options.selectors;
            for (l = 0, len1 = ref1.length; l < len1; l++) {
                selector = ref1[l];
                this.elements.push(new ElementTracker(selector));
            }
        }

        return ElementMonitor;

    })();

    ElementTracker = (function () {
        function ElementTracker(selector1) {
            this.selector = selector1;
            this.progress = 0;
            this.check();
        }

        ElementTracker.prototype.check = function () {
            if (document.querySelector(this.selector)) {
                return this.done();
            } else {
                return setTimeout(((function (_this) {
                    return function () {
                        return _this.check();
                    };
                })(this)), options.elements.checkInterval);
            }
        };

        ElementTracker.prototype.done = function () {
            return this.progress = 100;
        };

        return ElementTracker;

    })();

    DocumentMonitor = (function () {
        DocumentMonitor.prototype.states = {
            loading: 0,
            interactive: 50,
            complete: 100
        };

        function DocumentMonitor() {
            var _onreadystatechange, ref1;
            this.progress = (ref1 = this.states[document.readyState]) != null ? ref1 : 100;
            _onreadystatechange = document.onreadystatechange;
            document.onreadystatechange = (function (_this) {
                return function () {
                    if (_this.states[document.readyState] != null) {
                        _this.progress = _this.states[document.readyState];
                    }
                    return typeof _onreadystatechange === "function" ? _onreadystatechange.apply(null, arguments) : void 0;
                };
            })(this);
        }

        return DocumentMonitor;

    })();

    EventLagMonitor = (function () {
        function EventLagMonitor() {
            var avg, interval, last, points, samples;
            this.progress = 0;
            avg = 0;
            samples = [];
            points = 0;
            last = now();
            interval = setInterval((function (_this) {
                return function () {
                    var diff;
                    diff = now() - last - 50;
                    last = now();
                    samples.push(diff);
                    if (samples.length > options.eventLag.sampleCount) {
                        samples.shift();
                    }
                    avg = avgAmplitude(samples);
                    if (++points >= options.eventLag.minSamples && avg < options.eventLag.lagThreshold) {
                        _this.progress = 100;
                        return clearInterval(interval);
                    } else {
                        return _this.progress = 100 * (3 / (avg + 3));
                    }
                };
            })(this), 50);
        }

        return EventLagMonitor;

    })();

    Scaler = (function () {
        function Scaler(source1) {
            this.source = source1;
            this.last = this.sinceLastUpdate = 0;
            this.rate = options.initialRate;
            this.catchup = 0;
            this.progress = this.lastProgress = 0;
            if (this.source != null) {
                this.progress = result(this.source, 'progress');
            }
        }

        Scaler.prototype.tick = function (frameTime, val) {
            var scaling;
            if (val == null) {
                val = result(this.source, 'progress');
            }
            if (val >= 100) {
                this.done = true;
            }
            if (val === this.last) {
                this.sinceLastUpdate += frameTime;
            } else {
                if (this.sinceLastUpdate) {
                    this.rate = (val - this.last) / this.sinceLastUpdate;
                }
                this.catchup = (val - this.progress) / options.catchupTime;
                this.sinceLastUpdate = 0;
                this.last = val;
            }
            if (val > this.progress) {
                this.progress += this.catchup * frameTime;
            }
            scaling = 1 - Math.pow(this.progress / 100, options.easeFactor);
            this.progress += scaling * this.rate * frameTime;
            this.progress = Math.min(this.lastProgress + options.maxProgressPerFrame, this.progress);
            this.progress = Math.max(0, this.progress);
            this.progress = Math.min(100, this.progress);
            this.lastProgress = this.progress;
            return this.progress;
        };

        return Scaler;

    })();

    sources = null;

    scalers = null;

    bar = null;

    uniScaler = null;

    animation = null;

    cancelAnimation = null;

    Pace.running = false;

    handlePushState = function () {
        if (options.restartOnPushState) {
            return Pace.restart();
        }
    };

    if (window.history.pushState != null) {
        _pushState = window.history.pushState;
        window.history.pushState = function () {
            handlePushState();
            return _pushState.apply(window.history, arguments);
        };
    }

    if (window.history.replaceState != null) {
        _replaceState = window.history.replaceState;
        window.history.replaceState = function () {
            handlePushState();
            return _replaceState.apply(window.history, arguments);
        };
    }

    SOURCE_KEYS = {
        ajax: AjaxMonitor,
        elements: ElementMonitor,
        document: DocumentMonitor,
        eventLag: EventLagMonitor
    };

    (init = function () {
        var l, len1, len2, m, ref1, ref2, ref3, type;
        Pace.sources = sources = [];
        ref1 = ['ajax', 'elements', 'document', 'eventLag'];
        for (l = 0, len1 = ref1.length; l < len1; l++) {
            type = ref1[l];
            if (options[type] !== false) {
                sources.push(new SOURCE_KEYS[type](options[type]));
            }
        }
        ref3 = (ref2 = options.extraSources) != null ? ref2 : [];
        for (m = 0, len2 = ref3.length; m < len2; m++) {
            source = ref3[m];
            sources.push(new source(options));
        }
        Pace.bar = bar = new Bar;
        scalers = [];
        return uniScaler = new Scaler;
    })();

    Pace.stop = function () {
        Pace.trigger('stop');
        Pace.running = false;
        bar.destroy();
        cancelAnimation = true;
        if (animation != null) {
            if (typeof cancelAnimationFrame === "function") {
                cancelAnimationFrame(animation);
            }
            animation = null;
        }
        return init();
    };

    Pace.restart = function () {
        Pace.trigger('restart');
        Pace.stop();
        return Pace.start();
    };

    Pace.go = function () {
        var start;
        Pace.running = true;
        bar.render();
        start = now();
        cancelAnimation = false;
        return animation = runAnimation(function (frameTime, enqueueNextFrame) {
            var avg, count, done, element, elements, i, j, l, len1, len2, m, ref1, remaining, scaler, scalerList, sum;
            remaining = 100 - bar.progress;
            count = sum = 0;
            done = true;
            for (i = l = 0, len1 = sources.length; l < len1; i = ++l) {
                source = sources[i];
                scalerList = scalers[i] != null ? scalers[i] : scalers[i] = [];
                elements = (ref1 = source.elements) != null ? ref1 : [source];
                for (j = m = 0, len2 = elements.length; m < len2; j = ++m) {
                    element = elements[j];
                    scaler = scalerList[j] != null ? scalerList[j] : scalerList[j] = new Scaler(element);
                    done &= scaler.done;
                    if (scaler.done) {
                        continue;
                    }
                    count++;
                    sum += scaler.tick(frameTime);
                }
            }
            avg = sum / count;
            bar.update(uniScaler.tick(frameTime, avg));
            if (bar.done() || done || cancelAnimation) {
                bar.update(100);
                Pace.trigger('done');
                return setTimeout(function () {
                    bar.finish();
                    Pace.running = false;
                    return Pace.trigger('hide');
                }, Math.max(options.ghostTime, Math.max(options.minTime - (now() - start), 0)));
            } else {
                return enqueueNextFrame();
            }
        });
    };

    Pace.start = function (_options) {
        var error;
        extend(options, _options);
        Pace.running = true;
        try {
            bar.render();
        } catch (error) {
            NoTargetError = error;
        }
        if (!document.querySelector('.pace')) {
            return setTimeout(Pace.start, 50);
        } else {
            Pace.trigger('start');
            return Pace.go();
        }
    };

    if (typeof exports === 'object') {
        module.exports = Pace;
    }

    if (options.startOnPageLoad) {
        Pace.start();
    }

}).call(this);
