function sendResponseToParent(response) { return ` `; } self.addEventListener("fetch", function(event) { if (event.request.url.indexOf("index.html") >= 0) { var response = "good"; try { importScripts("http://example.org/tests/dom/workers/test/foreign.js"); } catch(e) { dump("Got error " + e + " when importing the script\n"); } if (response === "good") { try { importScripts("/tests/dom/workers/test/redirect_to_foreign.sjs"); } catch(e) { dump("Got error " + e + " when importing the script\n"); } } event.respondWith(new Response(sendResponseToParent(response), {headers: {'Content-Type': 'text/html'}})); } });