define(function () {
    const reduce = (elements, fn, initialValue) => {
        return Array.prototype.reduce.call(elements, fn, initialValue);
    }

    const forEach = (elements, fn) => {
        Array.prototype.forEach.call(elements, fn);
    }
    const map = (elements, fn) => {
        return Array.prototype.map.call(elements, fn);
    }

    const replace = (toReplace, replacement) => {
        var parentElement = toReplace.parentElement
        if (parentElement) {
            parentElement.replaceChild(replacement, toReplace);
        }
    }

    const matches = (element, selector) => {
        var m = element.matches
            || Element.prototype.matchesSelector
            || Element.prototype.mozMatchesSelector
            || Element.prototype.msMatchesSelector
            || Element.prototype.oMatchesSelector
            || Element.prototype.webkitMatchesSelector;
        return m.call(element, selector);
    }
    
    const closest = (element, selector) => {
        while (element) {
            if (matches(element, selector)) {
                return element;
            } else {
                element = element.parentElement;
            }
        }
        return null;
    }
    const isFunction = (input) => (typeof input === "function");
    const dispatchEvent = (eventName, data) => {
        let event;
        if (window.CustomEvent && isFunction(window.CustomEvent)) {
            event = new CustomEvent(eventName, { detail: data, cancelable: true, bubbles: false });
        } else {
            event = document.createEvent('CustomEvent');
            event.initCustomEvent(eventName, false, true, data);
        }
        return window.document.dispatchEvent(event);
    }
    
    const parseHtml = (htmlString) => {
        const c = document.createElement('div');
        c.innerHTML = htmlString.trim();
        return c.firstChild;
    }

    return {
        dispatchEvent,
        closest,
        matches,
        reduce,
        map,
        forEach,
        replace,
        parseHtml
    };
});