const CACHE_NAME = "food-journal-v1"; const ASSETS = [ "index.html", "ReviewDetails.html", "CreatePage.html", "static/CoveredByYourGrace-Regular.ttf", "static/CreatePage.css", "static/Form.css", "static/homepage.css", "static/ReviewDetails.css", "assets/images/0-star.svg", "assets/images/1-star.svg", "assets/images/2-star.svg", "assets/images/3-star.svg", "assets/images/4-star.svg", "assets/images/5-star.svg", "assets/images/default_plate.png", "assets/images/delete_icon_for_interface.png", "assets/images/edit_button_for_interface.png", "assets/images/Grouppink.png", "assets/images/home_button_for_interface.png", "assets/images/favicon.ico", "assets/images/Logo.png", "assets/scripts/CreatePage.js", "assets/scripts/localStorage.js", "assets/scripts/main.js", "assets/scripts/ReviewCard.js", "assets/scripts/ReviewDetails.js" ]; /** * Adds the install listener where the app assets are added to the cache */ self.addEventListener("install", async () => { // open the cace const cache = await caches.open(CACHE_NAME); // add all elements in ASSETS to the cache, these are all the files requried for the app to run await cache.addAll(ASSETS); }); /** * Adds an event listener on fetch events to serve cached resources while offline * Uses a network first structure to prioritize fetching from network in case of app updates. * If there are important updates, we want the user to get those if possible. */ self.addEventListener("fetch", (event) => { // add a response to the fetch event event.respondWith(caches.open(CACHE_NAME).then((cache) => { // try to return a network fetch response return fetch(event.request).then((fetchedResponse) => { // if there is a response, add it to the cache cache.put(event.request, fetchedResponse.clone()); // return the network response return fetchedResponse; }).catch(() => { // If there is not a network response, return the cached response // The ignoreVary option is used here to fix an issue where the service worker // would not serve certain requests unless the page was refreshed at least once return cache.match(event.request, {ignoreVary: true}); }); })); });