Duplicates an element, including computed styles, but only keeping non-default values.

Duplicate Element.js

function duplicateElement(element) {
	var newElement = document.createElement(element.tagName);
	document.body.appendChild(newElement);
	var newStyle = window.getComputedStyle(element, null).cssText;
	var baseProperties = window.getComputedStyle(newElement, null).cssText.split(';').map(function (e) {
		return e.trim();
	});
	newElement.innerHTML = element.innerHTML;
	//Remove styles with default value
	newElement.style.cssText = newStyle.split(';').map(function (e) {
		return e.trim();
	}).filter(function (e) {
		return baseProperties.indexOf(e) == -1;
	}).join("; ");
	return newElement;
}