PostCSS raw clone method

clone.js

function clone(node, deep, keepParent) {
	if (typeof node !== 'object') return node;

	var cloned = new node.constructor();

	Object.keys(node).forEach(function (key) {
		var value = node[key];

		if (keepParent && key === 'parent' || key === 'source') cloned[key] = value;
		else if (value instanceof Array) cloned[key] = deep ? value.map(function (child) {
			return clone(child, true, true);
		}) : [];
		else cloned[key] = clone(value, deep);
	});

	return cloned;
}