dom.js

(function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        define([], function () {
            return (root.dom = factory());
        });
    } else if (typeof module === 'object' && module.exports) {
        module.exports = (root.dom = factory());
    } else {
        root.dom = factory();
    }
})(this, function() {

    function addEventListener(node, events, callback) {
        if (events.constructor !== Array)
            events = [events];

        events.forEach(function(event) {
            node.addEventListener(event, callback);
        });
    }

    function dispatchEvent(node, type) {
        var event = document.createEvent('HTMLEvents');
        event.initEvent(type, true, false);
        node.dispatchEvent(event);
    }

    function appendChildren(node, children) {
        if (children.constructor !== Array) {
            children = [children];
        }
        children.forEach(function(child) {
            node.appendChild(child);
        });
    }

    function isTextNode(node) {
        return node instanceof Text;
    }

    function isImageNode(node) {
        return node instanceof HTMLImageElement;
    }

    return {
        addEventListener: addEventListener,
        dispatchEvent: dispatchEvent,
        appendChildren: appendChildren,
        isTextNode: isTextNode,
        isImageNode: isImageNode
    };
});