// Service worker for the xhr-response-url test. self.addEventListener('fetch', event => { const url = new URL(event.request.url); const respondWith = url.searchParams.get('respondWith'); if (!respondWith) return; if (respondWith == 'fetch') { const target = url.searchParams.get('url'); event.respondWith(fetch(target)); return; } if (respondWith == 'string') { const headers = {'content-type': 'text/plain'}; event.respondWith(new Response('hello', {headers})); return; } if (respondWith == 'document') { const doc = `