function handleRequest(request, response) { response.setStatusLine(request.httpVersion, 200, "OK"); let coop = request.queryString.replace(/\./g, ''); if (coop.length > 0) { response.setHeader("Cross-Origin-Opener-Policy", unescape(coop), false); } response.setHeader("Content-Type", "text/html; charset=utf-8", false); response.write("

Hello world

"); }