AliasIO / wappalyzer

jsonToDOM.namespaces = {

	html: "http://www.w3.org/1999/xhtml",

	xul: "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"

};

jsonToDOM.defaultNamespace = jsonToDOM.namespaces.html;

function jsonToDOM(jsonTemplate, doc, nodes) {

	function namespace(name) {

		var reElemNameParts = /^(?:(.*):)?(.*)$/.exec(name);

		return { namespace: jsonToDOM.namespaces[reElemNameParts[1]], shortName: reElemNameParts[2] };

	}

	// Note that 'elemNameOrArray' is: either the full element name (eg. [html:]div) or an array of elements in JSON notation

	function tag(elemNameOrArray, elemAttr) {

		// Array of elements?  Parse each one...

		if (Array.isArray(elemNameOrArray)) {

			var frag = doc.createDocumentFragment();

			Array.prototype.forEach.call(arguments, function(thisElem) {

				frag.appendChild(tag.apply(null, thisElem));

			});

			return frag;

		}

		// Single element? Parse element namespace prefix (if none exists, default to defaultNamespace), and create element

		var elemNs = namespace(elemNameOrArray);

		var elem = doc.createElementNS(elemNs.namespace || jsonToDOM.defaultNamespace, elemNs.shortName);

		// Set element's attributes and/or callback functions (eg. onclick)

			var val = elemAttr[key];

			if (nodes && key == "key") {

				nodes[val] = elem;

				continue;

			}

			var attrNs = namespace(key);

			if (typeof val == "function") {

				// Special case for function attributes; don't just add them as 'on...' attributes, but as events, using addEventListener

				elem.addEventListener(key.replace(/^on/, ""), val, false);

			}

			else {

				// Note that the default namespace for XML attributes is, and should be, blank (ie. they're not in any namespace)

				elem.setAttributeNS(attrNs.namespace || "", attrNs.shortName, val);

			}

		}

		// Create and append this element's children

		var childElems = Array.prototype.slice.call(arguments, 2);

		childElems.forEach(function(childElem) {

			if (childElem != null) {

				elem.appendChild(

					childElem instanceof doc.defaultView.Node ? childElem :

						Array.isArray(childElem) ? tag.apply(null, childElem) :

						doc.createTextNode(childElem));

			}

		});

		return elem;

	}

	return tag.apply(null, jsonTemplate);

}