Works in Chrome/Chromium/Firefox. There is much to improve in the Duktape/browser bindings and errors are not handled nicely yet, so keep your Javascript Console open. Also note that this page takes a few seconds to (re)load. You can embed code in the Dukweb link as a fragment identifier: http://duktape.org/dukweb.html#print('Hello%20world!')%3B.