polyfill-service/polyfills/_mutation/polyfill.js

A polyfill combinator

var _mutation = (function () { // eslint-disable-line no-unused-vars

	function isNode(object) {
		// DOM, Level2
		if (typeof Node === 'function') {
			return object instanceof Node;
		}
		// Older browsers, check if it looks like a Node instance)
		return object &&
			typeof object === "object" && 
			object.nodeName && 
			object.nodeType >= 1 &&
			object.nodeType <= 12;
	}

	// http://dom.spec.whatwg.org/#mutation-method-macro
	return function mutation(nodes) {
		if (nodes.length === 1) {
			return isNode(nodes[0]) ? nodes[0] : document.createTextNode(nodes[0] + '');
		}

		var fragment = document.createDocumentFragment();
		for (var i = 0; i < nodes.length; i++) {
			fragment.appendChild(isNode(nodes[i]) ? nodes[i] : document.createTextNode(nodes[i] + ''));

		}
		return fragment;
	};
}());